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  • Question 1 - A 60-year-old patient with a history of hypertension and chronic kidney disease (CKD) walks...

    Incorrect

    • A 60-year-old patient with a history of hypertension and chronic kidney disease (CKD) walks into the clinic to discuss her most recent blood results indicating an accelerated progression of CKD.Which of the following is the correct definition for accelerated progression of CKD?

      Your Answer: Severe irreversible kidney damage with a GFR of <25 ml/minute per 1.73 m²

      Correct Answer: A sustained decrease in GFR of 15 ml/minute/1.73 m 2 per year

      Explanation:

      Chronic kidney disease (CKD) is a disorder in which kidney function gradually deteriorates over time. It’s fairly prevalent, and it typically remains unnoticed for years, with only advanced stages of the disease being recognized. There is evidence that medication can slow or stop the progression of CKD, as well as lessen or prevent consequences and the risk of cardiovascular disease (CVD).CKD is defined as kidney damage (albuminuria) and/or impaired renal function (GFR 60 ml/minute per 1.73 m2) for three months or longer, regardless of clinical diagnosis.A prolonged decline in GFR of 25% or more with a change in GFR category within 12 months, or a sustained drop in GFR of 15 ml/minute/1.73 m² per year, is considered accelerated CKD progression.End-stage renal disease (ESRD) is defined as severe irreversible kidney impairment with a GFR of less than 15 ml/minute per 1.73 m² and a GFR of less than 15 ml/minute per 1.73 m².

    • This question is part of the following fields:

      • Physiology
      • Renal Physiology
      131.4
      Seconds
  • Question 2 - A 62-year-old man complains of chest pain and goes to the emergency room....

    Correct

    • A 62-year-old man complains of chest pain and goes to the emergency room. You diagnose him with an acute coronary syndrome and prescribe enoxaparin as part of his treatment plan.Enoxaparin inactivates which of the following?

      Your Answer: Thrombin

      Explanation:

      Enoxaparin is a low molecular weight heparin (LMWH) that works in the same way as heparin by binding to and activating the enzyme inhibitor antithrombin III. Antithrombin III inactivates thrombin by forming a 1:1 complex with it. Factor Xa and a few other clotting proteases are also inhibited by the heparin-antithrombin III complex.

    • This question is part of the following fields:

      • Cardiovascular Pharmacology
      • Pharmacology
      15.2
      Seconds
  • Question 3 - A 30-year-old rugby player suffers from an anterior cruciate ligament tear while pivoting...

    Incorrect

    • A 30-year-old rugby player suffers from an anterior cruciate ligament tear while pivoting to attempt to run around another player. An MRI was performed and showed that his injury caused two other structures in the knee joint to be injured. Which of the following structures is most likely also injured?

      Your Answer: Lateral collateral ligament

      Correct Answer: Medial meniscus

      Explanation:

      The O’Donoghue unhappy triad or terrible triad often occurs in contact and non-contact sports, such as basketball, football, or rugby, when there is a lateral force applied to the knee while the foot is fixated on the ground. This produces an abduction-external rotation mechanism of injury.The O’Donoghue unhappy triad comprises three types of soft tissue injury that frequently tend to occur simultaneously in knee injuries. O’Donoghue described the injuries as: anterior cruciate ligament tear, medial collateral ligament injury, and medial meniscal tear (lateral compartment bone bruise).

    • This question is part of the following fields:

      • Anatomy
      • Lower Limb
      15.2
      Seconds
  • Question 4 - The risk of renal impairment in a patient on ACE inhibitor therapy is...

    Incorrect

    • The risk of renal impairment in a patient on ACE inhibitor therapy is increased by concomitant treatment with which of the following drug classes:

      Your Answer: Calcium channel blockers

      Correct Answer: NSAIDs

      Explanation:

      Concomitant treatment with NSAIDs increases the risk of renal damage, and with potassium-sparing diuretics (or potassium-containing salt substitutes) increases the risk of hyperkalaemia. Hyperkalaemia and other side effects of ACE inhibitors are more common in the elderly and in those with impaired renal function and the dose may need to be reduced.

    • This question is part of the following fields:

      • Cardiovascular
      • Pharmacology
      11.2
      Seconds
  • Question 5 - Which lobe of the prostate gland is most commonly affected in benign prostatic...

    Incorrect

    • Which lobe of the prostate gland is most commonly affected in benign prostatic hypertrophy?

      Your Answer: Right lateral

      Correct Answer: Median

      Explanation:

      Benign enlargement of the prostate is common in men older than 50 years. The cause is possibly an imbalance in the hormonal control of the gland. The median lobe of the gland enlarges upward and encroaches within the sphincter vesicae, located at the neck of the bladder. The leakage of urine into the prostatic urethra causes an intense reflex desire to micturate. The enlargement of the median and lateral lobes of the gland produces elongation and lateral compression and distortion of the urethra so that the patient experiences difficulty in passing urine and the stream is weak. Back-pressure effects on the ureters and both kidneys are a common complication. The enlargement of the uvula vesicae (owing to the enlarged median lobe) results in the formation of a pouch of stagnant urine behind the urethral orifice within the bladder. The stagnant urine frequently becomes infected, and the inflamed bladder (cystitis) adds to the patient’s symptoms.In all operations on the prostate, the surgeon regards the prostatic venous plexus with respect. The veins have thin walls, are valveless, and are drained by several large trunks directly into the internal iliac veins. Damage to these veins can result in a severe haemorrhage.

    • This question is part of the following fields:

      • Abdomen And Pelvis
      • Anatomy
      195.4
      Seconds
  • Question 6 - A 7-year old boy is referred to the Paediatrics Department due to slurred...

    Correct

    • A 7-year old boy is referred to the Paediatrics Department due to slurred speech. Upon further examination, the attending physician noted the presence of dysdiadochokinesia, intention tremors, and nystagmus. An MRI is taken, which revealed a brain tumour.Which of the following options is the most probable diagnosis given the clinical features of the patient?

      Your Answer: Astrocytoma of cerebellum

      Explanation:

      Pilocytic astrocytoma (PCA), previously known as cystic cerebellar astrocytoma or juvenile pilocytic astrocytoma, was first described in 1931 by Harvey Cushing, based on a case series of cerebellar astrocytomas; though he never used these terms but rather described a spongioblastoma. They are low-grade, and usually well-circumscribed tumours, which tend to occur in young patients. By the World Health Organization (WHO) classification of central nervous system tumours, they are considered grade I gliomas and have a good prognosis.PCA most commonly occurs in the cerebellum but can also occur in the optic pathway, hypothalamus, and brainstem. They can also occur in the cerebral hemispheres, although this tends to be the case in young adults. Presentation and treatment vary for PCA in other locations. Glial cells include astrocytes, oligodendrocytes, ependymal cells, and microglia. Astrocytic tumours arise from astrocytes and are the most common tumour of glial origin. The WHO 2016 categorized these tumours as either diffuse gliomas or other astrocytic tumours. Diffuse gliomas include grade II and III diffuse astrocytomas, grade IV glioblastoma, and diffuse gliomas of childhood. The other astrocytic tumours group include PCA, pleomorphic xanthoastrocytoma, subependymal giant cell astrocytoma, and anaplastic pleomorphic xanthoastrocytoma.PCA can present with symptoms secondary to the posterior fossa mass effect. This may include obstructive hydrocephalus, with resultant headache, nausea and vomiting, and papilledema. If hydrocephalus occurs before the fusion of the cranial sutures (<18-months-of-age), then an increase in head circumference will likely occur. Lesions of the cerebellar hemisphere result in peripheral ataxia, dysmetria, intention tremor, nystagmus, and dysarthria. In contrast, lesions of the vermis cause a broad-based gait, truncal ataxia, and titubation. Posterior fossa lesions can also cause cranial nerve palsies. Diplopia may occur due to abducens palsy from the stretching of the nerve. They may also have blurred vision due to papilledema. Seizures are rare with posterior fossa lesions.

    • This question is part of the following fields:

      • Anatomy
      • Central Nervous System
      5.4
      Seconds
  • Question 7 - 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: Hypertension

      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
      6.7
      Seconds
  • Question 8 - A patient presents with a cough, productive of green sputum and fever. He...

    Incorrect

    • A patient presents with a cough, productive of green sputum and fever. He was commenced on antibiotics 4 days earlier, but his condition has worsened. There is a documented history of penicillin allergy, and the GP prescribed erythromycin.Erythromycin exert its pharmacological effect by binding to?

      Your Answer: N-acetylmuramic acid

      Correct Answer: The 50S subunit of the bacterial ribosome

      Explanation:

      Macrolides are bacteriostatic antibiotics. They act by binding to the 50S subunit of the bacterial ribosome and inhibit translocation, therefore, inhibiting protein synthesis.

    • This question is part of the following fields:

      • Infections
      • Pharmacology
      18.7
      Seconds
  • Question 9 - Which of the following statements is correct regarding the neuronal action potential? ...

    Incorrect

    • Which of the following statements is correct regarding the neuronal action potential?

      Your Answer: Action potentials can have a graded response depending on the stimuli.

      Correct Answer: Initial depolarisation occurs as a result of a Na + influx.

      Explanation:

      The resting potential in most neurons has a value of approximately -70 mV. The threshold potential is generally around -55 mV. Initial depolarisation when there is Na+influx through ligand-gated Na+channels. Action potential is an all or nothing response. The size of the action potential is constant and so, the intensity of the stimulus is coded by the frequency of firing of a neuron. K+efflux is responsible for repolarisation.

    • This question is part of the following fields:

      • Basic Cellular
      • Physiology
      6.9
      Seconds
  • Question 10 - Which of the following is NOT a function of the commensal intestinal bacterial...

    Incorrect

    • Which of the following is NOT a function of the commensal intestinal bacterial flora:

      Your Answer: Involved in the synthesis of vitamin B and vitamin K

      Correct Answer: Breakdown of haem into bilirubin

      Explanation:

      Commensal intestinal bacterial flora have a role in:Keeping pathogenic bacteria at bay by competing for space and nutrientConverting conjugated bilirubin to urobilinogen (some of which is reabsorbed and excreted in urine) and stercobilinogen which is excreted in the faecesThe synthesis of vitamins K, B12, thiamine and riboflavinThe breakdown of primary bile acids to secondary bile acidsThe breakdown of cholesterol, some food additives and drugs

    • This question is part of the following fields:

      • Gastrointestinal
      • Physiology
      174041.9
      Seconds
  • Question 11 - Which of the following medications can block the effect of adrenaline? ...

    Incorrect

    • Which of the following medications can block the effect of adrenaline?

      Your Answer:

      Correct Answer: Beta-blockers

      Explanation:

      Beta-blockers may reduce the response to adrenaline in the treatment of anaphylactic reactions. Noncardioselective beta-blockers in particular can antagonize the broncho dilating and cardio stimulatory effects of adrenaline by blocking beta-2 adrenergic receptors in the smooth muscles of the bronchial tree and in the heart muscles.

    • This question is part of the following fields:

      • Pharmacology
      • Respiratory
      0
      Seconds
  • Question 12 - An 11-year-old boy was brought to the emergency room due to fever and...

    Incorrect

    • An 11-year-old boy was brought to the emergency room due to fever and pain in the ears. Upon physical examination, it was observed that the mastoid area is erythematous and there is a presence of a boggy, tender mass. A diagnosis of acute mastoiditis was made.Which of the following parts of the temporal bone is most likely involved?

      Your Answer:

      Correct Answer: Petrous part

      Explanation:

      Mastoiditis is the inflammation of a portion of the temporal bone referred to as the mastoid air cells. The mastoid air cells are epithelium lined bone septations that are continuous with the middle ear cavity.The temporal bone is composed of four parts: the mastoid process, the petrous pyramid, the squamous, and tympanic portions. The mastoid process and the petrous pyramid are the portions of particular interest because of the prevalence of suppurations within these parts of the temporal bone.

    • This question is part of the following fields:

      • Anatomy
      • Head And Neck
      0
      Seconds
  • Question 13 - Which of the following statements regarding the infectivity periods of these corresponding diseases...

    Incorrect

    • Which of the following statements regarding the infectivity periods of these corresponding diseases is correct?

      Your Answer:

      Correct Answer: Rubella is infectious until 5 days after the rash appears

      Explanation:

      Rubella can be contagious from 7 days before to 7 days after the rash appears.Patients with measles are contagious from 1-2 days before the onset of symptoms.A person with chickenpox is considered contagious beginning 1 to 2 days before rash onset until all the chickenpox lesions have crusted (scabbed). The infectious period of mumps is considered from 2 days before to 5 days after parotitis onset.Hepatitis A is highly transmissible and has an average incubation period of 28 to 30 days (range 15–50 days). The maximum infectivity is during the second half of the incubation period (i.e. while asymptomatic) and most cases are considered non-infectious after the first week of jaundice.

    • This question is part of the following fields:

      • Microbiology
      • Specific Pathogen Groups
      0
      Seconds
  • Question 14 - Which of these structures is the smallest and deepest component of muscle connective...

    Incorrect

    • Which of these structures is the smallest and deepest component of muscle connective tissue?

      Your Answer:

      Correct Answer: Endomysium

      Explanation:

      There are three types of muscle:Skeletal muscleCardiac muscleSmooth muscleIndividual muscle is enveloped in a layer of dense irregular connective tissue called the epimysium. The epimysium protects the muscles from friction against bones and other muscles.Skeletal muscle is composed of muscle fibres, referred to as myofibers which is ensheathed by a wispy layer of areolar connective tissue called the endomysium. The endomysium is the smallest and deepest component of muscle connective tissue. Myofibers grouped together in bundles form fascicles, or fasciculi. These are surrounded by a type of connective tissue called the perimysium.Beneath the endomysium lies the sarcolemma, an elastic sheath with infoldings that invaginate the interior of the myofibers, particularly at the motor endplate of the neuromuscular junction.

    • This question is part of the following fields:

      • Basic Cellular Physiology
      • Physiology
      0
      Seconds
  • Question 15 - In a 7-year-old child with chickenpox, which of the following would you advise...

    Incorrect

    • In a 7-year-old child with chickenpox, which of the following would you advise the mother NOT to do?

      Your Answer:

      Correct Answer: Give ibuprofen for the fever

      Explanation:

      Chickenpox (varicella zoster) is a highly contagious airborne disease and has an incubation period of between 7-21 days. It often has a prodromal phase when there is a fever, aches and headaches, dry cough, and sore throat before onset of rash.Some recognized complications of chickenpox are:OrchitisHepatitisPneumoniaEncephalitisInfected spotsOtitis mediaMyocarditisGlomerulonephritisAppendicitisPancreatitisTreatment is symptomatic and includes using paracetamol to manage fever. There is a link between use of ibuprofen in patients with chicken-pox and necrotizing fasciitis so Ibuprofen should NOT be used. An emollient and antihistamine can be used to ease the itchy rash and oral hydration is encouraged.

    • This question is part of the following fields:

      • Microbiology
      • Specific Pathogen Groups
      0
      Seconds
  • Question 16 - About what percentage of patients with hepatitis A develop chronic infection: ...

    Incorrect

    • About what percentage of patients with hepatitis A develop chronic infection:

      Your Answer:

      Correct Answer: None

      Explanation:

      Chronic hepatitis and carrier state does not occur in hepatitis A infection and complete immunity is attained after infection.

    • This question is part of the following fields:

      • Microbiology
      • Pathogens
      0
      Seconds
  • Question 17 - A 58-year-old man with a traumatic brain injury is brought into the ER....

    Incorrect

    • A 58-year-old man with a traumatic brain injury is brought into the ER. A medical student asks you about the processes that occur in the brain following a traumatic injury.One of these best describes the central nervous systems response to injury.

      Your Answer:

      Correct Answer: Degeneration of the axon occurs proximally before it occurs distally

      Explanation:

      Following neuronal injury, as seen in traumatic brain injury, the axon undergoes anterograde degeneration. Degradation starts from the cell body (proximally) and progresses distally. The axon becomes fragmented and degenerates. The brain shows no reactive changes to injury is incorrect. Following major injury such as stroke, the brain undergoes a process of liquefactive degeneration, which leaves cystic spaces within the brain.Axonal regeneration does not occur to any significant extent within the central nervous system unlike what is seen in the peripheral nervous system. Astrocytes undergo reactive gliosis, leaving behind a firm translucent tissue around sites of damage.

    • This question is part of the following fields:

      • General Pathology
      • Pathology
      0
      Seconds
  • Question 18 - Regarding tapeworm, which of the following statements is CORRECT: ...

    Incorrect

    • Regarding tapeworm, which of the following statements is CORRECT:

      Your Answer:

      Correct Answer: Diagnosis is by direct visualisation of characteristic eggs in the stool.

      Explanation:

      Diagnosis of tapeworm is by direct visualisation of characteristic eggs in stool. Humans may be infected by pork or beef tapeworm. Treatment is with praziquantel or niclosamide. Specialist advice should be sought for the management of neurocysticercosis.Iron-deficiency anaemia is typically seen in hookworm infection. Threadworms migrate from the intestine at night to lay eggs on the perianal skin. Mebendazole is first line treatment for threadworms.

    • This question is part of the following fields:

      • Microbiology
      • Pathogens
      0
      Seconds
  • Question 19 - Normal saline (sodium chloride 0.9%) contains which of the following: ...

    Incorrect

    • Normal saline (sodium chloride 0.9%) contains which of the following:

      Your Answer:

      Correct Answer: Sodium and chloride

      Explanation:

      Normal saline (sodium chloride 0.9%) contains:Na+150 mmol/LCl-150 mmol/L

    • This question is part of the following fields:

      • Fluids And Electrolytes
      • Pharmacology
      0
      Seconds
  • Question 20 - A patient in the Emergency Department had a diagnosis of diabetic ketoacidosis (DKA)...

    Incorrect

    • A patient in the Emergency Department had a diagnosis of diabetic ketoacidosis (DKA) and you commence an insulin infusion. Which of these statements concerning insulin is true?

      Your Answer:

      Correct Answer: Insulin has a short half-life of around 5-10 minutes

      Explanation:

      Insulin, a peptide hormone, is produced in the pancreas by the beta-cells of the islets of Langerhans.The beta-cells first synthesise an inactive precursor called preproinsulin which is converted to proinsulin by signal peptidases, which remove a signal peptide from the N-terminus. Proinsulin is converted to insulin by the removal of the C-peptide.Insulin has a short half-life in the circulation of about 5-10 minutes.Glucagon and parasympathetic stimulation stimulates insulin release.

    • This question is part of the following fields:

      • Endocrine Physiology
      • Physiology
      0
      Seconds
  • Question 21 - A 28-year-old asthmatic patient is seen in the Emergency Department following an acute...

    Incorrect

    • A 28-year-old asthmatic patient is seen in the Emergency Department following an acute exacerbation. His symptoms start to improve when your consultant gives him a high dose of IV aminophylline.Which of the following is correct mechanism of action of aminophylline ?

      Your Answer:

      Correct Answer: Inhibition of phosphodiesterase

      Explanation:

      Aminophylline has the following properties:Phosphodiesterase inhibitor that increases intracellular cAMP and relaxes smooth muscle in the bronchial airways and pulmonary blood vessels.Mast cell stabilization is achieved by using a non-selective adenosine receptor antagonist.

    • This question is part of the following fields:

      • Pharmacology
      • Respiratory Pharmacology
      0
      Seconds
  • Question 22 - A GP is considering prescribing a non-steroidal anti-inflammatory (NSAID) for pain relief for...

    Incorrect

    • A GP is considering prescribing a non-steroidal anti-inflammatory (NSAID) for pain relief for a patient with a knee injuryWhich of these statements about NSAIDs is NOT true?

      Your Answer:

      Correct Answer: Side effects are less commonly seen with indomethacin than naproxen

      Explanation:

      Most NSAIDs act as non-selective inhibitors of the enzyme cyclo-oxygenase (COX). They inhibit both COX-1 and COX-2 isoenzymes. Only about 60% of patients will respond to any given NSAID.It can take 21 days of treatment for a clinically appreciable reduction in inflammation to be apparent. If no improvement is seen after 21 days, the NSAID should be changed.The use of NSAIDs in the 3rd trimester of pregnancy is associated with the following risks: delayed onset of labour, premature closure of ductus arteriosus and foetal kernicterus.Side effects are lowest in Ibuprofen and highest in indomethacin. so side effects are more commonly seen with indomethacin than naproxen.

    • This question is part of the following fields:

      • Musculoskeletal Pharmacology
      • Pharmacology
      0
      Seconds
  • Question 23 - You need to give your patient antibiotics, so you call microbiology for some advice.Of...

    Incorrect

    • You need to give your patient antibiotics, so you call microbiology for some advice.Of the following antibacterial drugs, which of them is a protein synthesis inhibitor?

      Your Answer:

      Correct Answer: Erythromycin

      Explanation:

      Bacteriostatic antibiotics include erythromycin and other macrolides. They work by attaching to the bacterial ribosome’s 50S subunit, preventing translocation and, as a result, inhibit protein synthesis. Macrolide antibiotics are actively concentrated inside leukocytes and delivered into the infection site as a result.Action Mechanisms- Examples:Cell wall production is inhibitedVancomycinVancomycinCephalosporinsThe function of the cell membrane is disrupted NystatinPolymyxinsAmphotericin B Inhibition of protein synthesisChloramphenicolMacrolidesAminoglycosidesTetracyclinesNucleic acid synthesis inhibitionQuinolonesTrimethoprimRifampicin5-nitroimidazolesSulphonamidesAnti-metabolic activityIsoniazid

    • This question is part of the following fields:

      • Infections
      • Pharmacology
      0
      Seconds
  • Question 24 - Which of the following laboratory findings is NOT typical of von Willebrand disease...

    Incorrect

    • Which of the following laboratory findings is NOT typical of von Willebrand disease (VWD):

      Your Answer:

      Correct Answer: Thrombocytopaenia

      Explanation:

      Laboratory findings typically show (although this varies depending on VWD type):Abnormal PFA-100 testLow factor VIII levels (if low a factor VIII/VWF binding assay is performed)Prolonged APTT (or normal)Normal PTLow VWF levelsDefective platelet aggregationNormal platelet count

    • This question is part of the following fields:

      • Haematology
      • Pathology
      0
      Seconds
  • Question 25 - A 6-year-old female is brought to the Ophthalmology Clinic by her mother with...

    Incorrect

    • A 6-year-old female is brought to the Ophthalmology Clinic by her mother with the complaint of itching, redness, and a watery discharge of the right eye. Past medical history revealed an upper respiratory tract infection one week ago. On examination of the right eye, there is mild erythema of the palpebral conjunctiva and visible follicles seen on eversion of the eyelid, lid oedema, and subconjunctival petechial haemorrhages. The discharge is watery and not purulent. You diagnose her with viral conjunctivitis. According to the current NICE guidelines, which ONE of the following management options would NOT be included for this patient?

      Your Answer:

      Correct Answer: The child should be excluded from school until the infection has resolved

      Explanation:

      The NICE guidelines do NOT recommend isolating a patient with viral conjunctivitis from others or skipping school or work. The disease is contagious, but the spread of the disease can be controlled by maintaining good hygiene practices such as:1. frequent hand washing2. use of separate flannels and towels3. Avoid close contact with othersAntibiotic prescriptions are not part of the NICE guidelines for viral conjunctivitis as they will not affect the course of the disease. Most cases of viral conjunctivitis are self-limiting and resolve within one to two weeks.The NICE guidelines recommend that symptoms may be eased with self-care measures such as:1. Bathing/cleaning the eyelids with cotton wool soaked in sterile saline or boiled and cooled water to remove any discharge2. Cool compresses applied gently around the eye area3. Use of lubricating drops or artificial tears

    • This question is part of the following fields:

      • Microbiology
      • Specific Pathogen Groups
      0
      Seconds
  • Question 26 - A 53 year old male is found to have megaloblastic anaemia secondary to...

    Incorrect

    • A 53 year old male is found to have megaloblastic anaemia secondary to folate deficiency. He has a known history of alcohol abuse. Which of the following is characteristic of this condition?

      Your Answer:

      Correct Answer: Increased mean corpuscular volume (MCV)

      Explanation:

      Megaloblastic anaemia occurs when there is inhibition of DNA synthesis as red blood cells are produced. Impairment of DNA synthesis causes the cell cycle to be unable to progress from the growth stage to the mitosis stage. As a result, there is continuous cell growth without division, with an increase in mean corpuscular volume (MCV), which presents as macrocytosis. The most common cause of this defect in red cell DNA synthesis is hypovitaminosis, in particular, vitamin B12 deficiency or folate deficiency.Folate is an essential vitamin that can be found in most foods, and is highest in liver, green vegetables and yeast. 200 – 250 μg is found in the normal daily diet, and about 50% is absorbed. The daily adult requirement is about 100 μg and its absorption is principally from the duodenum and jejunum. Folate stores are normally only adequate for 4 months and so clinical features of folate deficiency usually become evident after this time.

    • This question is part of the following fields:

      • Haematology
      • Pathology
      0
      Seconds
  • Question 27 - A 24-year-old athlete drinks a 500 ml hypertonic sports drink before an endurance...

    Incorrect

    • A 24-year-old athlete drinks a 500 ml hypertonic sports drink before an endurance event he participates in.Which of the following effects will this cause?

      Your Answer:

      Correct Answer: The interstitial fluid becomes more concentrated

      Explanation:

      Osmosis is the passive movement of water across a semipermeable membrane from a region of low solute concentration to a region of higher solute concentration.When hypertonic fluid is ingested:The plasma becomes CONCENTRATED. The cells lose water and shrinkThe intracellular fluid becomes more concentrated.Water and ions move freely from the plasma into the interstitial fluid and the interstitial fluid becomes more concentrated. The increased osmotic potential draws water out of the cells.

    • This question is part of the following fields:

      • Basic Cellular Physiology
      • Physiology
      0
      Seconds
  • Question 28 - Which of the following is NOT an effect of gastrin: ...

    Incorrect

    • Which of the following is NOT an effect of gastrin:

      Your Answer:

      Correct Answer: Stimulation of insulin release

      Explanation:

      Gastrin acts to:Stimulate acid secretion from parietal cells (both directly and indirectly by stimulating release of histamine from ECL cells)Stimulate pepsinogen secretion from chief cellsIncrease gastric motilityStimulate growth of gastric mucosa

    • This question is part of the following fields:

      • Gastrointestinal
      • Physiology
      0
      Seconds
  • Question 29 - The movement of molecules across the cell membrane relies greatly on active transport.Which of...

    Incorrect

    • The movement of molecules across the cell membrane relies greatly on active transport.Which of the following statements about active transport is correct?

      Your Answer:

      Correct Answer: Active transport occurs in glucose absorption from the gut

      Explanation:

      The movement of a material against a concentration gradient, i.e. from a low to a high concentration, is known as active transport. Primary active transport is defined as active transport that involves the use of chemical energy, such as adenosine triphosphate (ATP). Secondary active transport occurs when an electrochemical gradient is used.The sodium-potassium pump, calcium ATPase pump, and proton pump are all key active transport systems that use ATP. An electrochemical gradient is used by the sodium-calcium co-transporter, which is an example of secondary active transport.The sodium-dependent hexose transporter SGLUT-1 transports glucose and galactose into enterocytes. Secondary active transport is exemplified here.

    • This question is part of the following fields:

      • Basic Cellular Physiology
      • Physiology
      0
      Seconds
  • Question 30 - 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:

      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
      0
      Seconds

SESSION STATS - PERFORMANCE PER SPECIALTY

Abdomen And Pelvis (1/2) 50%
Anatomy (3/4) 75%
Central Nervous System (1/1) 100%
Cardiovascular (0/1) 0%
Pharmacology (1/3) 33%
Infections (1/1) 100%
Gastrointestinal (0/1) 0%
Physiology (0/2) 0%
Respiratory (0/1) 0%
Head And Neck (1/1) 100%
Microbiology (1/1) 100%
Specific Pathogen Groups (1/1) 100%
Basic Cellular Physiology (0/1) 0%
Passmed