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  • Question 1 - The nucleus tractus solitaries is medullary nucleus that processes the following inputs except:...

    Incorrect

    • The nucleus tractus solitaries is medullary nucleus that processes the following inputs except:

      Your Answer: Taste from the anterior 2/3 of the tongue (CN VII)

      Correct Answer: Sensory input from the semi-circular canal (CN VIII)

      Explanation:

      Located in the brain stem is a series of purely sensory nuclei known as tractus solitaries. Inputs of the nucleus tractus solitaries include:Taste information from the facial nerve (anterior 2/3 of the tongue), glossopharyngeal nerve (posterior 1/3) and vagus nerve (small area on the epiglottis).Sensory information from the ear (auricular branch of the vagus nerve).Chemoreceptors and mechanoreceptors of the general visceral afferent pathway (GVA) in the carotid body via glossopharyngeal nerve, aortic bodies, and the sinoatrial node, via the vagus nerve.Chemically and mechanically sensitive neurons of the general visceral afferent pathway (GVA) with endings located in the heart, lungs, airways, gastrointestinal system, pharynx, and liver via the glossopharyngeal and vagus nerves.

    • This question is part of the following fields:

      • Medicine
      • Neurology
      12.9
      Seconds

  • Question 2 - Which receptor type is associated with the inhibition of pancreatic endocrine secretion? ...

    Correct

    • Which receptor type is associated with the inhibition of pancreatic endocrine secretion?

      Your Answer: Α2

      Explanation:

      The activation of alpha 2-adrenergic receptors in pancreatic beta-cells works by inhibiting the secretion of insulin.

    • This question is part of the following fields:

      • Medicine
      • Neurology
      5.6
      Seconds

  • Question 3 - What is the normal portal venous pressure? ...

    Incorrect

    • What is the normal portal venous pressure?

      Your Answer: 12 mm hg

      Correct Answer: 6 mm hg

      Explanation:

      Portal venous pressure is the blood pressure in the hepatic portal vein, and is normally between 5-10 mmHg

    • This question is part of the following fields:

      • Hepatobiliary
      • Medicine
      7.1
      Seconds

  • Question 4 - Choose the correct statement regarding the protein C/S system? ...

    Incorrect

    • Choose the correct statement regarding the protein C/S system?

      Your Answer: Thrombomodulin enhances the procoagulant activity of thrombin.

      Correct Answer: The protein C/S complex inactivates factor Va and VIIIa

      Explanation:

      The best characterized function of Protein S is its role in the anti coagulation pathway, where it functions as a cofactor to Protein C in the inactivation of Factors Va and VIIIa.

    • This question is part of the following fields:

      • Haematology
      • Medicine
      21.7
      Seconds

  • Question 5 - Which of the following is not a cause of drug-induced hepatitis? ...

    Correct

    • Which of the following is not a cause of drug-induced hepatitis?

      Your Answer: Ethambutol

      Explanation:

      Although rare, ocular toxicity in the form of optic neuritis (most commonly retrobulbar neuritis) has been well documented as a side effect of ethambutol. It is renally excreted and not associated with hepatitis.

    • This question is part of the following fields:

      • Medicine
      • Pharmacology
      15.7
      Seconds

  • Question 6 - Regarding taste threshold and intensity discrimination: ...

    Incorrect

    • Regarding taste threshold and intensity discrimination:

      Your Answer: 10% change in concentration of substance tasted is necessary before an intensity difference can be detected

      Correct Answer: 30% change in concentration of substance tasted is necessary before an intensity difference can be detected

      Explanation:

      The ability of humans to differentiate differences in intensity of taste is poor. A 30% change in the concentration of the substance being tasted is required before an intensity difference is perceived.

    • This question is part of the following fields:

      • Medicine
      • Neurology
      17
      Seconds

  • Question 7 - In a 60kg adult male with normal mean arterial pressure and oxygen consumption,...

    Correct

    • In a 60kg adult male with normal mean arterial pressure and oxygen consumption, what proportion of the cardiac output at rest goes to the brain?

      Your Answer: 10-15%

      Explanation:

      The rate of cerebral blood flow in the adult is typically 750 millilitres per minute, which is 10-15% of the cardiac output. On average around 13.9% of cardiac output is distributed to the brain.

    • This question is part of the following fields:

      • Medicine
      • Neurology
      3.8
      Seconds

  • Question 8 - Which of the following is a physiological effect of pregnancy on the kidney?...

    Incorrect

    • Which of the following is a physiological effect of pregnancy on the kidney?

      Your Answer: Increased creatinine

      Correct Answer: Decreased creatinine

      Explanation:

      A pregnant woman may experience an increase in kidney and ureter size. The glomerular filtration rate (GFR) commonly increases by 50%, returning to normal around 20 weeks postpartum. Plasma sodium does not change because this is offset by the increase in GFR. There is decreased blood urea nitrogen (BUN) and creatinine and potentially glucosuria (due to saturated tubular reabsorption).

    • This question is part of the following fields:

      • Medicine
      • Renal
      7.8
      Seconds

  • Question 9 - Which of the following values of bone mineral density measured by DEXA would...

    Correct

    • Which of the following values of bone mineral density measured by DEXA would signify osteopenia?

      Your Answer: T score of -2.2

      Explanation:

      DEXA T Scores:Normal T-score ≥ −1.0Osteopenia −2.5 < T-score < −1.0Osteoporosis T-score ≤ −2.5Severe osteoporosis T-score ≤ −2.5 with fragility fracture

    • This question is part of the following fields:

      • Endocrinology
      • Medicine
      3.4
      Seconds

  • Question 10 - Direct conduction from the atrium to the ventricles is prevented by: ...

    Correct

    • Direct conduction from the atrium to the ventricles is prevented by:

      Your Answer: Annulus fibrosus

      Explanation:

      The annulus fibrosus disconnects the syncytium complex. The atria are rapidly activated however the activation peters out when the insulating layer-the annulus fibrosus-is reached.

    • This question is part of the following fields:

      • Cardiovascular
      • Medicine
      4.5
      Seconds

SESSION STATS - PERFORMANCE PER SPECIALTY

Medicine (5/10) 50%
Neurology (2/4) 50%
Hepatobiliary (0/1) 0%
Haematology (0/1) 0%
Pharmacology (1/1) 100%
Renal (0/1) 0%
Endocrinology (1/1) 100%
Cardiovascular (1/1) 100%
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