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  • Question 1 - A 44 year old woman is brought to ED having fallen down the...

    Correct

    • A 44 year old woman is brought to ED having fallen down the stairs and injured her right arm. On examination she is unable to abduct her arm normally, and has weakness of lateral rotation. She has sensory loss over the lateral aspect of her upper arm. Which of the following injuries is most likely to produce this pattern of injury:

      Your Answer: Surgical neck of humerus fracture

      Explanation:

      Damage to the axillary nerve will result in loss of abduction past about 15 degrees and weakness of lateral rotation due to paralysis of the deltoid and teres minor and loss of sensation over the regimental badge area on the upper lateral arm. The axillary nerve is most likely injured in fracture of the surgical neck of the humerus due to its course where it winds around this region together with the posterior humeral circumflex vessels.

    • This question is part of the following fields:

      • Anatomy
      • Upper Limb
      32.5
      Seconds
  • Question 2 - Glucagon may be used as an antidote for overdose with which of the...

    Correct

    • Glucagon may be used as an antidote for overdose with which of the following:

      Your Answer: Beta blockers

      Explanation:

      Glucagon is a peptide hormone that is produced and secreted by alpha cells of the islets of Langerhans, which are located in the endocrine portion of the pancreas. The main physiological role of glucagon is to stimulate hepatic glucose output, thereby leading to increases in glycaemia. It provides the major counter-regulatory mechanism to insulin in maintaining glucose homeostasis.Hypoglycaemia is the principal stimulus for the secretion of glucagon but may also be used as an antidote in beta-blocker overdose and in anaphylaxis in patients on beta-blockers that fail to respond to adrenaline. Glucagon then causes:GlycogenolysisGluconeogenesisLipolysis in adipose tissueThe secretion of glucagon is also stimulated by:AdrenalineCholecystokininArginineAlanineAcetylcholineThe secretion of glucagon is inhibited by:InsulinSomatostatinIncreased free fatty acidsIncreased urea productionGlycolysis is the metabolic pathway that converts glucose into pyruvate. The free energy released by this process is used to form ATP and NADH. Glycolysis is inhibited by glucagon, and glycolysis and gluconeogenesis are reciprocally regulated so that when one cell pathway is activated, the other is inactive and vice versa.Glucagon has a minor effect of enhancing lipolysis in adipose tissue. Lipolysis is the breakdown of lipids and involves the hydrolysis of triglycerides into glycerol and free fatty acids. It makes fatty acids available for oxidation.

    • This question is part of the following fields:

      • Endocrine
      • Pharmacology
      10.3
      Seconds
  • Question 3 - All of the following statement are correct regarding endothelium derived nitric oxide except:...

    Incorrect

    • All of the following statement are correct regarding endothelium derived nitric oxide except:

      Your Answer: Increased blood flow stimulates NO production.

      Correct Answer: Nitric oxide production is inhibited by local mediators such as bradykinin, histamine and serotonin.

      Explanation:

      Factors that elevate intracellular Ca2+ increase nitric oxide (NO) production by the endothelium included local mediators such as histamine and serotonin, bradykinin, and some neurotransmitters like substance P. NO production is also stimulated by increased flow (shear stress) and additionally activates prostacyclin synthesis. As a result of basal production of NO, there is continuous modulation of vascular resistance and as a result, there is increased production of nitric oxide acts which causes vasodilation. Platelet activation and thrombosis are inhibited by nitric oxide.

    • This question is part of the following fields:

      • Cardiovascular
      • Physiology
      69
      Seconds
  • Question 4 - A 7-days-old neonate is taken to the emergency department. She's pyretic, lethargic, and unresponsive, and...

    Incorrect

    • A 7-days-old neonate is taken to the emergency department. She's pyretic, lethargic, and unresponsive, and her fontanelle has bulged.  Antibiotics are started, and a lumbar puncture reveals Gram-negative rods. Which pathogen is most likely to be the cause:

      Your Answer: Group B streptococcus (GBS)

      Correct Answer: Escherichia coli

      Explanation:

      Among neonates, group B streptococci (GBS) are the most commonly identified causes of bacterial meningitis, implicated in roughly 50% of all cases. Escherichia coli(Gram-negative rods) accounts for another 20%. Thus, the identification and treatment of maternal genitourinary infections is an important prevention strategy.

    • This question is part of the following fields:

      • Infections
      • Microbiology
      13.2
      Seconds
  • Question 5 - You are about to perform a blood test on a patient suspected of...

    Incorrect

    • You are about to perform a blood test on a patient suspected of having systemic lupus erythematosus. Which antibodies will indicate a positive result of systemic lupus erythematosus?

      Your Answer: Antineutrophil cytoplasmic antibodies

      Correct Answer: Anti-nuclear antibodies

      Explanation:

      Antinuclear antibodies (ANA) are autoantibodies to the cells’ nucleus. The ANA test is the most sensitive diagnostic test for verifying the disease’s diagnosis. Other autoantibodies that may be found in SLE patients include rheumatoid factor, antiphospholipid antibodies, and antimitochondrial antibodies.

    • This question is part of the following fields:

      • Inflammatory Responses
      • Pathology
      17
      Seconds
  • Question 6 - Regarding acute idiopathic thrombocytopaenic purpura (ITP), which of the following statements is CORRECT:...

    Incorrect

    • Regarding acute idiopathic thrombocytopaenic purpura (ITP), which of the following statements is CORRECT:

      Your Answer: It is most common in women aged 15 - 50 years.

      Correct Answer: Over 80% of children recover without treatment.

      Explanation:

      Acute ITP is most common in children. In approximately 75% of cases, the episode follows vaccination or infection such as chicken pox or glandular fever. Most cases are caused by non-specific immune complex attachment to platelets. Acute ITP usually has a very sudden onset and the symptoms usually disappear in less than 6 months (often within a few weeks). It is usually a self-limiting condition and over 80% of children recover without treatment; in 5 – 10% of cases a chronic form of the disease develops.

    • This question is part of the following fields:

      • Haematology
      • Pathology
      3.9
      Seconds
  • Question 7 - Which of the following is most likely affected in De Quervain's tenosynovitis? ...

    Correct

    • Which of the following is most likely affected in De Quervain's tenosynovitis?

      Your Answer: Extensor pollicis brevis

      Explanation:

      De Quervain tenosynovitis is named after the Swiss surgeon, Fritz de Quervain, who first described it in 1895. It is a condition which involves tendon entrapment affecting the first dorsal compartment of the wrist. With this condition thickening of the tendon sheaths around the abductor pollicis longus and extensor pollicis brevis develops where the tendons pass in through the fibro-osseous tunnel located along the radial styloid at the distal wrist. Pain is exacerbated by thumb movement and radial and ulnar deviation of the wrist.The estimated prevalence of de Quervain tenosynovitis is about 0.5% in men and 1.3% in women with peak prevalence among those in their forties and fifties. It may be seen more commonly in individuals with a history of medial or lateral epicondylitis. Bilateral involvement is often reported in new mothers or child care providers in whom spontaneous resolution typically occurs once lifting of the child is less frequent.

    • This question is part of the following fields:

      • Anatomy
      • Upper Limb
      30.9
      Seconds
  • Question 8 - Which of the following best describes the mechanism of action of aspirin: ...

    Incorrect

    • Which of the following best describes the mechanism of action of aspirin:

      Your Answer: Increases production of cAMP

      Correct Answer: Cyclo-oxygenase (COX) inhibitor

      Explanation:

      Aspirin is a non-steroidal anti-inflammatory drug (NSAID). Aspirin irreversibly inhibits cyclooxygenase (COX) enzymes and the resulting inhibition of prostaglandin synthesis results in analgesic, antipyretic and to a lesser extent anti-inflammatory actions.

    • This question is part of the following fields:

      • Central Nervous System
      • Pharmacology
      18.6
      Seconds
  • Question 9 - Regarding Gaussian sample distribution, which of the following statements is false? ...

    Incorrect

    • Regarding Gaussian sample distribution, which of the following statements is false?

      Your Answer: The mode is the most commonly observed measurement

      Correct Answer: It can be skewed left or right

      Explanation:

      Gaussian distribution, also known as normal distribution, is the most important probability distribution in statistics because it fits many natural phenomena. The normal distribution is a probability function that describes how the values of a variable are distributed. Below are its characteristics:(1) Bell-shaped and symmetrical about the mean(2) The mean, median, mode are all equal(3) The total area under the curve and above the x-axis is equal to 1(4) It has long tapering tails extending infinitely but never touching the x-axis(5) It is determined by its parameters: its mean and standard deviation(6) The standard deviation becomes a more meaningful quality than merely being a measure of dispersionThe mean is the most common measure of central tendency. It is the sum of all observed values divided by the number of observation, and is also known as the ‘average’.The median is the value that falls in the middle position when the observations are ranked in order from the smallest to the largest. If the number of observations is odd, the median is the middle number. If it is even, the median is the average of the two middle numbers.The mode is the value that occurs with the greatest frequency in a set of observations, and is commonly used in public health statistics, such as the top 10 causes of mortality.

    • This question is part of the following fields:

      • Evidence Based Medicine
      33.4
      Seconds
  • Question 10 - You have been called to review a patient and his management in the...

    Incorrect

    • You have been called to review a patient and his management in the resuscitation room. A very sick patient has been started on mannitol in his treatment protocol. Out of the following, what is NOT an FDA-recognized indication for the use of mannitol?

      Your Answer: Rhabdomyolysis

      Correct Answer: Congestive cardiac failure

      Explanation:

      Mannitol is the most widely used osmotic diuretic that is most commonly used to reduce cerebral oedema and intracranial pressure. Mannitol has four FDA approved uses clinically:1. Reduction of intracranial pressure and brain mass2. reduce intraocular pressure if this is not achievable by other means3. promote diuresis for acute renal failure to prevent or treat the oliguric phase before irreversible damage4. promote diuresis to promote the excretion of toxic substances, materials, and metabolitesIt can be used in rhabdomyolysis-induced renal failure, especially in crush injuries. Mannitol reduces osmotic swelling and oedema in the injured muscle cells and helps restore skeletal muscle function. It is a low molecular weight compound and can be freely filtered at the glomerulus and not reabsorbed. This way increases the osmolality of the glomerular filtrate and tubular fluid, increasing urinary volume by an osmotic effect. It also does not cross the blood-brain barrier (BBB).Mannitol causes an expansion of the extracellular fluid space, which may worsen congestive cardiac failure. Contraindications to the use of mannitol include:1. Anuria due to renal disease2. Acute intracranial bleeding (except during craniotomy)3. Severe cardiac failure4. Severe dehydration5. Severe pulmonary oedema or congestion6. Known hypersensitivity to mannitol

    • This question is part of the following fields:

      • Cardiovascular Pharmacology
      • Pharmacology
      23.5
      Seconds
  • Question 11 - A 5-year-old girl presents in a paediatric clinic with symptoms of viral gastroenteritis....

    Incorrect

    • A 5-year-old girl presents in a paediatric clinic with symptoms of viral gastroenteritis. You encourage the mother to treat the child at home with oral rehydration therapy (ORT), e.g. dioralyte.Out of the following, which statement is FALSE regarding the use of ORT in the management of gastroenteritis?

      Your Answer: 50 ml/kg given over 4 hours is recommended for the treatment of mild dehydration

      Correct Answer: ORT is sugar-free

      Explanation:

      One of the major complications of gastroenteritis is dehydration. Choosing the correct fluid replacement therapy is essential according to a patient’s hydration status. Oral rehydration therapy (ORT) refers to the restitution of water and electrolyte deficits in dehydrated patients using an oral rehydration salt (ORS) solution. It is a fluid replacement strategy that is less invasive than other strategies for fluid replacement and has successfully lowered the mortality rate of diarrhoea in developing countries. Some characteristics of Oral rehydration solutions are:- slightly hypo-osmolar (about 250 mmol/litre) to prevent the possible induction of osmotic diarrhoea.- contain glucose (e.g. 90 mmol/L in dioralyte). The addition of glucose improves sodium and water absorption in the bowel and prevents hypoglycaemia. – also contains essential mineral saltsCurrent NICE guidance recommends that 50 ml/kg is given over 4 hours to treat mild dehydration.Once rehydrated, a child should continue with their usual daily fluid intake plus 200 ml ORT after each loose stool. In an infant, give ORT at 1-1.5 x the normal feed volume and in an adult, give 200-400 ml after each loose stool.

    • This question is part of the following fields:

      • Fluids & Electrolytes
      • Pharmacology
      15.5
      Seconds
  • Question 12 - Which of the following is NOT a function of bile: ...

    Incorrect

    • Which of the following is NOT a function of bile:

      Your Answer: Neutralisation of gastric acid in the small intestine

      Correct Answer: Digestion of fats into monoglycerides and fatty acids.

      Explanation:

      Bile functions to eliminate endogenous and exogenous substances from the liver (including bilirubin), to neutralise gastric acid in the small intestine, and to emulsify fats in the small intestine and facilitate their digestion and absorption. Bile salts also act as bactericides, destroying many of the microbes that may be present in the food. Bile doesn’t contain digestive enzymes for digestion of lipids into monoglycerides and fatty acids; this is performed mainly by pancreatic lipase.

    • This question is part of the following fields:

      • Gastrointestinal
      • Physiology
      45.3
      Seconds
  • Question 13 - A 71-year-old woman presents with complaints of fatigue and worsening muscle weakness, and...

    Incorrect

    • A 71-year-old woman presents with complaints of fatigue and worsening muscle weakness, and blood tests done shows a potassium level of 2.4 mmol/L.Which is NOT a recognised cause of hypokalaemia?

      Your Answer: Gitelman’s syndrome

      Correct Answer: Type 4 renal tubular acidosis

      Explanation:

      A plasma potassium less than 3.5 mmol/L defines hypokalaemia.Excessive liquorice ingestion causes hypermineralocorticoidism and leads to hypokalaemia.Gitelman’s syndrome causes metabolic alkalosis with hypokalaemia and hypomagnesaemia. It is an inherited defect of the distal convoluted tubules.Bartter’s syndrome causes hypokalaemic alkalosis. It is a rare inherited defect in the ascending limb of the loop of Henle.Type 1 and 2 renal tubular acidosis both cause hypokalaemia Type 4 renal tubular acidosis causes hyperkalaemia.

    • This question is part of the following fields:

      • Physiology
      • Renal Physiology
      10.5
      Seconds
  • Question 14 - A 43-year old male is taken to the Emergency Room for a lacerated...

    Correct

    • A 43-year old male is taken to the Emergency Room for a lacerated wound on the abdomen, situated above the umbilicus. A short segment of the small bowel has herniated through the wound.Which of these anatomic structures is the deepest structure injured in the case above?

      Your Answer: Transversalis fascia

      Explanation:

      The following structures are the layers of the anterior abdominal wall from the most superficial to the deepest layer:SkinFatty layer of the superficial fascia (Camper’s fascia)Membranous layer of the superficial fascia (Scarpa’s fascia)Aponeurosis of the external and internal oblique musclesRectus abdominis muscleAponeurosis of the internal oblique and transversus abdominisFascia transversalisExtraperitoneal fatParietal peritoneum

    • This question is part of the following fields:

      • Abdomen And Pelvis
      • Anatomy
      40.1
      Seconds
  • Question 15 - Following the administration of a medication for a heart condition, a 69-year-old man...

    Correct

    • Following the administration of a medication for a heart condition, a 69-year-old man develops hypothyroidism.Which of the following drugs is most likely to be the cause?

      Your Answer: Amiodarone

      Explanation:

      Amiodarone has a chemical structure that is similar to that of thyroxine and can bind to the nuclear thyroid receptor. It can cause both hypothyroidism and hyperthyroidism, though hypothyroidism is far more common, with 5-10% of patients suffering from it.

    • This question is part of the following fields:

      • Cardiovascular Pharmacology
      • Pharmacology
      11.7
      Seconds
  • Question 16 - A patient has a diagnosis of acute osteomyelitis. They have no joint prosthesis...

    Correct

    • A patient has a diagnosis of acute osteomyelitis. They have no joint prosthesis on indwelling metal work and no known drug allergies. He has had a recent skin swab that has cultured MRSA and MRSA infection is suspected.Which of the following antibacterial agents would be most appropriate to prescribe in this case? Select ONE answer only.

      Your Answer: Vancomycin

      Explanation:

      In the majority of patients the commonest causative organism for osteomyelitis isStaphylococcus aureus.Salmonella spp. are the commonest cause in patients with sickle cell disease.Other bacteria that can cause osteomyelitis include:Enterobacter spp.Group A and B streptococcusHaemophilus influenzaeThe current recommendations by NICE and the BNF on the treatment of osteomyelitis are:Flucloxacillin first-lineConsider adding fusidic acid or rifampicin for initial 2 weeksIf penicillin allergic use clindamycinIf MRSA is suspected use vancomycinSuggested duration of treatment is 6 weeks for acute infection

    • This question is part of the following fields:

      • Microbiology
      • Specific Pathogen Groups
      13.3
      Seconds
  • Question 17 - Regarding the hard palate, which of the following statements is CORRECT: ...

    Incorrect

    • Regarding the hard palate, which of the following statements is CORRECT:

      Your Answer: The sensory supply to the palate is primarily from branches of the mandibular nerve.

      Correct Answer: Lymphatic vessels from the palate usually drain into deep cervical lymph nodes.

      Explanation:

      Lymphatic vessels from the pharynx and palate drain into the deep cervical lymph nodes.

    • This question is part of the following fields:

      • Anatomy
      • Head And Neck
      12.9
      Seconds
  • Question 18 - Captopril should not be used if you have any of the following conditions:...

    Incorrect

    • Captopril should not be used if you have any of the following conditions:

      Your Answer: Second degree heart block

      Correct Answer: Renal artery stenosis

      Explanation:

      Contraindications indications of Captopril include:- Bilateral renal artery stenosis- Hypersensitivity to ACE inhibitors- Anuria- History of ACEI-induced angioedema- Hereditary or idiopathic angioedema- Co-administration of Neprilysin inhibitors (e.g., sacubitril) with ACE inhibitors may increase angioedema risk; do not administer ACE inhibitors within 36 hours of switching to or from sacubitril/valsartan.If ACE inhibitors are used, they should be initiated only under specialist supervision and renal function should be monitored regularly. ACE inhibitors should also be used with particular caution in patients who may have undiagnosed and clinically silent renovascular disease. This includes patients with peripheral vascular disease or those with severe generalised atherosclerosis.

    • This question is part of the following fields:

      • Cardiovascular
      • Pharmacology
      14.4
      Seconds
  • Question 19 - Alpha cells of the endocrine pancreas produce which of the following hormones: ...

    Incorrect

    • Alpha cells of the endocrine pancreas produce which of the following hormones:

      Your Answer: Secretin

      Correct Answer: Glucagon

      Explanation:

      Glucagon is a peptide hormone that is produced and secreted by alpha cells of the islets of Langerhans, which are located in the endocrine portion of the pancreas. The main physiological role of glucagon is to stimulate hepatic glucose output, thereby leading to increases in glycaemia. It provides the major counter-regulatory mechanism to insulin in maintaining glucose homeostasis.Hypoglycaemia is the principal stimulus for the secretion of glucagon but may also be used as an antidote in beta-blocker overdose and in anaphylaxis in patients on beta-blockers that fail to respond to adrenaline. Glucagon then causes:GlycogenolysisGluconeogenesisLipolysis in adipose tissueThe secretion of glucagon is also stimulated by:AdrenalineCholecystokininArginineAlanineAcetylcholineThe secretion of glucagon is inhibited by:InsulinSomatostatinIncreased free fatty acidsIncreased urea productionGlycolysis is the metabolic pathway that converts glucose into pyruvate. The free energy released by this process is used to form ATP and NADH. Glycolysis is inhibited by glucagon, and glycolysis and gluconeogenesis are reciprocally regulated so that when one cell pathway is activated, the other is inactive and vice versa.Glucagon has a minor effect of enhancing lipolysis in adipose tissue. Lipolysis is the breakdown of lipids and involves the hydrolysis of triglycerides into glycerol and free fatty acids. It makes fatty acids available for oxidation.

    • This question is part of the following fields:

      • Endocrine
      • Physiology
      12.1
      Seconds
  • Question 20 - The QRS duration of a broad-complex tachyarrhythmia is: ...

    Incorrect

    • The QRS duration of a broad-complex tachyarrhythmia is:

      Your Answer: Greater than 0.16 s

      Correct Answer: Greater than or equal to 0.12 s

      Explanation:

      It’s a broad-complex tachycardia if the QRS duration is 0.12 seconds or more. It’s a narrow-complex tachycardia if the QRS complex is shorter than 0.12 seconds. The QRS duration should be examined if the patient with tachyarrhythmia is stable.  

    • This question is part of the following fields:

      • Cardiovascular
      • Pharmacology
      14.5
      Seconds
  • Question 21 - Among the following infectious diseases, which is typically considered to have an incubation...

    Correct

    • Among the following infectious diseases, which is typically considered to have an incubation period of less than 3 weeks?

      Your Answer: Diphtheria

      Explanation:

      C. diphtheriae, which is the causative agent of diphtheria, is carried in the upper respiratory tract and spread by droplet infection or hand-to-mouth contact. The incubation period averages 2 to 5 days.Infectious mononucleosis is caused by Epstein-Barr virus (EBV). The incubation period for EBV varies from 2 weeks to 2 months.The incubation for Hepatitis A virus is approximately 1 month.The incubation period for Hepatitis C ranges from 2 weeks to 6 months.The period from infection to development of anti-HIV antibodies is usually less than 1 month but may be up to 3 months.

    • This question is part of the following fields:

      • Microbiology
      • Specific Pathogen Groups
      27.3
      Seconds
  • Question 22 - A young farmer who is caught under farm machinery and suffering from a...

    Incorrect

    • A young farmer who is caught under farm machinery and suffering from a major crush injury is taken to the emergency department and requires a quick induction sequence. In this type of injury, which of the following anaesthetic medicines should be avoided?

      Your Answer: Atracurium

      Correct Answer: Suxamethonium

      Explanation:

      Suxamethonium is a neuromuscular blocker. It is contraindicated in patients who have experienced massive trauma, hyperkalemic, or burn injuries.

    • This question is part of the following fields:

      • Anaesthesia
      • Pharmacology
      13.5
      Seconds
  • Question 23 - ACE inhibitors are indicated for all of the following EXCEPT for: ...

    Incorrect

    • ACE inhibitors are indicated for all of the following EXCEPT for:

      Your Answer: Diabetic nephropathy

      Correct Answer: Angina

      Explanation:

      ACE inhibitors have many uses and are generally well tolerated. They are indicated for:Heart failureHypertensionDiabetic nephropathySecondary prevention of cardiovascular events

    • This question is part of the following fields:

      • Cardiovascular
      • Pharmacology
      9.8
      Seconds
  • Question 24 - Which of the following is NOT a common clinical manifestation of sickle cell...

    Incorrect

    • Which of the following is NOT a common clinical manifestation of sickle cell disease?

      Your Answer: Hand-foot syndrome

      Correct Answer: Iron deficiency

      Explanation:

      Signs and symptoms of Sickle cell disease(SCD):Acute and chronic pain: The most common clinical manifestation of SCD is vaso-occlusive crisis; pain crises are the most distinguishing clinical feature of SCDBone pain: Often seen in long bones of extremities, primarily due to bone marrow infarctionAnaemia: Universally present, chronic, and haemolytic in natureAplastic crisis: Serious complication due to infection with parvovirus B19 (B19V)Splenic sequestration: Characterized by the onset of life-threatening anaemia with rapid enlargement of the spleen and high reticulocyte countInfection: Organisms that pose the greatest danger include encapsulated respiratory bacteria, particularly Streptococcus pneumoniae; adult infections are predominantly with gram-negative organisms, especially SalmonellaGrowth retardation, delayed sexual maturation, being underweightHand-foot syndrome: This is a dactylitis presenting as bilateral painful and swollen hands and/or feet in childrenAcute chest syndrome: Young children present with chest pain, fever, cough, tachypnoea, leucocytosis, and pulmonary infiltrates in the upper lobes; adults are usually afebrile, dyspnoeic with severe chest pain, with multilobar/lower lobe diseasePulmonary hypertension: Increasingly recognized as a serious complication of SCDAvascular necrosis of the femoral or humeral head: Due to vascular occlusionCentral nervous system (CNS) involvement: Most severe manifestation is strokeOphthalmologic involvement: Ptosis, retinal vascular changes, proliferative retinitisCardiac involvement: Dilation of both ventricles and the left atriumGastrointestinal involvement: Cholelithiasis is common in children; liver may become involvedGenitourinary involvement: Kidneys lose concentrating capacity; priapism is a well-recognized complication of SCDDermatologic involvement: Leg ulcers are a chronic painful problem

    • This question is part of the following fields:

      • Haematology
      • Pathology
      10.6
      Seconds
  • Question 25 - Which of the following statements is INCORRECT. Fick's law tells us that the...

    Correct

    • Which of the following statements is INCORRECT. Fick's law tells us that the rate of diffusion of a gas across a membrane increases as:

      Your Answer: the partial pressure gradient decreases.

      Explanation:

      Fick’s law tells us that the rate of diffusion of a gas increases: the larger the surface area involved in gas exchangethe greater the partial pressure gradient across the membranethe thinner the membranethe more soluble the gas in the membranethe lower the molecular weight of the gas

    • This question is part of the following fields:

      • Physiology
      • Respiratory
      14.1
      Seconds
  • Question 26 - A suicidal patient had lacerated his wrist, which resulted in an ulnar nerve...

    Incorrect

    • A suicidal patient had lacerated his wrist, which resulted in an ulnar nerve injury. Which of the following will confirm the presence of an ulnar nerve injury?

      Your Answer:

      Correct Answer: Claw hand appearance

      Explanation:

      An ulnar injury may result in abnormal sensations in the little finger and ring finger, usually on the palm side, weakness, and loss of coordination of the fingers. A claw like deformity of the hand and wrist is present. Pain, numbness, decreased sensation, tingling, or burning sensation in the areas controlled by the nerve are also possible.

    • This question is part of the following fields:

      • Anatomy
      • Upper Limb
      0
      Seconds
  • Question 27 - A 57-year old man presented himself to the emergency room with persistent cough....

    Incorrect

    • A 57-year old man presented himself to the emergency room with persistent cough. During history taking, a record of his previous sputum sample was seen and the report stated that it tested positive for AFB (acid-fast bacilli). What is the most likely pathogen?

      Your Answer:

      Correct Answer: Mycobacterium tuberculosis

      Explanation:

      M. tuberculosis is the causative agent of pulmonary tuberculosis (TB). The most commonly used diagnostic test for the diagnosis of pulmonary TB is the direct sputum smear microscopy (DSSM) wherein the presence of acid-fast bacilli (AFB) is tested. The most common method is the hot method or also known as Ziehl-Neelsen method. This is a staining method special for Mycobacteria species because they are known to be acid-fast which means that they are not easily decolorized by acid alcohol. Once the DSSM tests positive for acid-fast bacilli, this indicates possible infection with tuberculosis. The gold standard for diagnosis is still culture but Mycobacteria species are slow-growers that is why DSSM is considered the best diagnostic method. A positive AFB smear and correlation with symptoms is usually used by physicians to create a final diagnosis of pulmonary tuberculosis.

    • This question is part of the following fields:

      • Microbiology
      • Pathogens
      0
      Seconds
  • Question 28 - Which of the following risk ratios indicates no difference in risk between two groups:...

    Incorrect

    • Which of the following risk ratios indicates no difference in risk between two groups:

      Your Answer:

      Correct Answer: 1

      Explanation:

      A risk ratio of 1 indicates no difference in risk between groups.If the risk ratio of an event is > 1, the rate of that event is increased in the exposed group compared to the control group.If the risk ratio is < 1, the rate of that event is reduced in the exposed group compared to the control group.

    • This question is part of the following fields:

      • Evidence Based Medicine
      • Statistics
      0
      Seconds
  • Question 29 - Which of the following describes the site of a Meckel's diverticulum: ...

    Incorrect

    • Which of the following describes the site of a Meckel's diverticulum:

      Your Answer:

      Correct Answer: Ileum

      Explanation:

      Meckel’s lies on the antimesenteric surface of the middle-to-distal ileum, approximately 2 feet proximal to the ileocaecal junction. It appears as a blind-ended tubular outpouching of bowel, about 2 inches long, occurring in about 2% of the population, and may contain two types of ectopic tissue (gastric and pancreatic). The rich blood supply to the diverticulum is provided by the superior mesenteric artery.Proximal to the major duodenal papilla the duodenum is supplied by the gastroduodenal artery (branch of the coeliac trunk) and distal to the major duodenal papilla it is supplied by the inferior pancreaticoduodenal artery (branch of superior mesenteric artery). The arterial supply to the jejunoileum is from the superior mesenteric artery.

    • This question is part of the following fields:

      • Abdomen
      • Anatomy
      0
      Seconds
  • Question 30 - Adenosine is primarily indicated for which of the following: ...

    Incorrect

    • Adenosine is primarily indicated for which of the following:

      Your Answer:

      Correct Answer: Paroxysmal supraventricular tachycardia

      Explanation:

      Adenosine is usually the treatment of choice for terminating paroxysmal supraventricular tachycardia including those associated with accessory conduction pathways e.g. Wolff-Parkinson-White syndrome.

    • This question is part of the following fields:

      • Cardiovascular
      • Pharmacology
      0
      Seconds

SESSION STATS - PERFORMANCE PER SPECIALTY

Anatomy (3/5) 60%
Upper Limb (2/3) 67%
Endocrine (1/2) 50%
Pharmacology (8/9) 89%
Cardiovascular (2/4) 50%
Physiology (1/5) 20%
Infections (0/1) 0%
Microbiology (1/4) 25%
Central Nervous System (1/1) 100%
Evidence Based Medicine (0/2) 0%
Cardiovascular Pharmacology (2/2) 100%
Fluids & Electrolytes (1/1) 100%
Gastrointestinal (0/1) 0%
Renal Physiology (0/1) 0%
Abdomen And Pelvis (1/1) 100%
Specific Pathogen Groups (0/2) 0%
Anaesthesia (1/1) 100%
Respiratory (1/1) 100%
Pathogens (1/1) 100%
Statistics (0/1) 0%
Abdomen (0/1) 0%
Passmed