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  • Question 1 - What type of visual field defect are you likely to see in a...

    Correct

    • What type of visual field defect are you likely to see in a lesion of the visual cortex:

      Your Answer: Contralateral homonymous hemianopia with macular sparing

      Explanation:

      A lesion of the visual cortex will result in a contralateral homonymous hemianopia with macular sparing.

    • This question is part of the following fields:

      • Anatomy
      • Central Nervous System
      23.1
      Seconds

  • Question 2 - Action potentials are transmitted from myocyte to myocyte via which of the following:...

    Correct

    • Action potentials are transmitted from myocyte to myocyte via which of the following:

      Your Answer: Gap junctions

      Explanation:

      Action potentials are transmitted to adjacent myocytes via gap junctions.

    • This question is part of the following fields:

      • Cardiovascular
      • Physiology
      19.2
      Seconds

  • Question 3 - Haemophilia B results from a deficiency in: ...

    Correct

    • Haemophilia B results from a deficiency in:

      Your Answer: Factor IX

      Explanation:

      Haemophilia B is a bleeding disorder caused by a deficiency of clotting factor IX. It is the second commonest form of haemophilia, and is rarer than haemophilia A. Haemophilia B tends to be similar to haemophilia A but less severe. The two disorders can only be distinguished by specific coagulation factor assays.The incidence is one-fifth of that of haemophilia A. Laboratory findings demonstrate prolonged APTT, normal PT and low factor IX.Haemophilia B inherited in an X-linked recessive fashion, affecting males born to carrier mothers.There is also a variation called Leyden, in which factor IX levels are below 1% until puberty, when they rise, potentially reaching as high as 40-60% of normal. This is thought to be due to the effects of testosterone at puberty.

    • This question is part of the following fields:

      • Haematology
      • Pathology
      5.6
      Seconds

  • Question 4 - For which of the following is micelle formation necessary to facilitate intestinal absorption?...

    Incorrect

    • For which of the following is micelle formation necessary to facilitate intestinal absorption?

      Your Answer: Bile acids

      Correct Answer: Vitamin D

      Explanation:

      The arrangement of micelles is such that hydrophobic lipid molecules lie in the centre, surrounded by hydrophilic bile acids that are arranged in the outer region. This arrangement allows the entry of micelles into the aqueous layers surrounding the microvilli. As a result, the products of fat digestion (fatty acids and monoglycerides), cholesterol and fat-soluble vitamins (such as vitamin D) can then diffuse passively into the enterocytes. The bile salts are left within the lumen of the gut where they are reabsorbed from the ileum or excreted in faeces.

    • This question is part of the following fields:

      • Gastrointestinal
      • Physiology
      14.4
      Seconds

  • Question 5 - Which of the following clinical features is NOT a typical feature of haemolytic...

    Incorrect

    • Which of the following clinical features is NOT a typical feature of haemolytic anaemias:

      Your Answer: Jaundice

      Correct Answer: Angular cheilitis

      Explanation:

      Features include: AnaemiaJaundice (caused by unconjugated bilirubin in plasma, bilirubin is absent from urine)Pigment gallstonesSplenomegalyAnkle ulcersExpansion of marrow with, in children, bone expansion e.g. frontal bossing in beta-thalassaemia majorAplastic crisis caused by parvovirus

    • This question is part of the following fields:

      • Haematology
      • Pathology
      47
      Seconds

  • Question 6 - What is the mechanism of action of captopril: ...

    Incorrect

    • What is the mechanism of action of captopril:

      Your Answer:

      Correct Answer: Inhibition of the conversion of angiotensin I to angiotensin II

      Explanation:

      Angiotensin-converting enzyme inhibitors (ACE inhibitors) e.g. captopril inhibit the conversion of angiotensin I to angiotensin II, and thus have a vasodilatory effect, lowering both arterial and venous resistance. The cardiac output increases and, because the renovascular resistance falls, there is an increase in renal blood flow. This latter effect, together with reduced aldosterone release, increases Na+ and H2O excretion, contracting the blood volume and reducing venous return to the heart.

    • This question is part of the following fields:

      • Cardiovascular
      • Pharmacology
      0
      Seconds

  • Question 7 - 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:

      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
      0
      Seconds

  • Question 8 - The first line drug for oral candidiasis is: ...

    Incorrect

    • The first line drug for oral candidiasis is:

      Your Answer:

      Correct Answer: Nystatin

      Explanation:

      Treatment for oral candidiasis is with nystatin mouthwash. In unresponsive cases, oral fluconazole is used

    • This question is part of the following fields:

      • Microbiology
      • Pathogens
      0
      Seconds

  • Question 9 - A 54 year old patient presents with vertigo, ipsilateral hemiataxia, dysarthria, ptosis and...

    Incorrect

    • A 54 year old patient presents with vertigo, ipsilateral hemiataxia, dysarthria, ptosis and miosis. Which of these blood vessels has most likely been occluded?

      Your Answer:

      Correct Answer: Posterior inferior cerebellar artery

      Explanation:

      Posterior inferior cerebellar artery (PICA) occlusion is characterised by vertigo, ipsilateral hemiataxia, dysarthria, ptosis and miosis. PICA occlusion causes infarction of the posterior inferior cerebellum, inferior cerebellar vermis and lateral medulla.

    • This question is part of the following fields:

      • Anatomy
      • Central Nervous System
      0
      Seconds

  • Question 10 - How does dipyridamole mediate its antiplatelet effect: ...

    Incorrect

    • How does dipyridamole mediate its antiplatelet effect:

      Your Answer:

      Correct Answer: It is a phosphodiesterase inhibitor.

      Explanation:

      Dipyridamole inhibits both the reuptake of adenosine and phosphodiesterase, preventing the degradation of cAMP and thus blocking the platelet aggregation response to ADP.

    • This question is part of the following fields:

      • Haematology
      • Pathology
      0
      Seconds

SESSION STATS - PERFORMANCE PER SPECIALTY

Anatomy (1/1) 100%
Central Nervous System (1/1) 100%
Cardiovascular (1/1) 100%
Physiology (1/2) 50%
Haematology (1/2) 50%
Pathology (1/2) 50%
Gastrointestinal (0/1) 0%
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