Test Your Knowledge - Free MCQ PRACTICE
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DRIVINGTEST
A fresh set of 20 random questions is generated every time you open this page and every time you refresh it.
For each of the following multiple choice questions, choose the most appropriate answer :

1. Which of the following can cause a shift of the oxygen- hemoglobin dissociation curve to the left?
A. pH
B. Temperature
C. 2,3-BPG
D. pCO2

2. If an individual is breathing 15 times per minute, respiratory frequency is approximately:
A. 0.1 Hz
B. 0.15 Hz
C. 0.2 Hz
D. 0.25 Hz

3. Na-K-2Cl transporter in the apical membrane of the thick ascending limb of the loop of Henle is an example of:
A. primary active transport
B. secondary active transport
C. passive transport
D. countertransport

4. Stimulation of sympathetic nerves to the pineal gland:
A. increases synthesis of melanin
B. increases activity of serotonin N-acetyl transferase
C. reduces melatonin synthesis
D. increases release of serotonin

5. Which of the following increases insulin / glucagon molar ratio the most?
A. A large carbohydrate meal
B. Intravenous glucose
C. Overnight fast
D. A small protein meal

6. New cortical cells are formed from reserve cells in the:
A. zona glomerulosa
B. zona fasciculata
C. zona reticularis
D. All these

7. The latch-bridge mechanism in smooth muscle is responsible for:
A. fast muscle twitch
B. sustained muscle contraction
C. excitation-contraction coupling
D. unstable membrane potential

8. In glucocorticoid-remediable aldosteronism:
A. angiotensin II has no effect on aldosterone synthesis
B. angiotensin II stimulates whereas angiotensin III inhibits aldosterone synthesis
C. aldosterone synthase is expressed in the zona fasciculata and exquisitely sensitive to stimulation by ACTH.
D. administration of glucocorticoids increases ACTH levels

9. Which of the following hormones does not act through G-protein coupled receptors?
A. Dopamine
B. Epinephrine
C. Angiotensin II
D. Retinoic acid

10. The testis-determining gene (or the SRY gene) is located normally on/in:
A. chromosome 6
B. chromosome 12
C. short arm of chromosome 22
D. Y chromosome

11. In the stretch reflex, relaxation of antagonist muscles is due to:
A. reciprocal innervation
B. presynaptic inhibition
C. Ia fiber stimulation
D. antidromic conduction

12. Which of the following strategies would most likely be therapeutic in an individual with achalasia?
A. Injection of tetanus toxin into the lower esophageal sphincter
B. Surgical division of the lower esophageal sphincter
C. Administration of a muscarinic receptor agonist
D. Administration of a nitric oxide synthase inhibitor

13. Select all correct answers. The type(s) of contraction that normally occur(s) only in the colon is/are:
A. peristalsis
B. antiperistalsis
C. mass action contraction
D. Both and C

14. Which of the following hormones is critical for acute regulation of a falling serum ionized calcium?
A. Calbindin
B. Calcitonin
C. Calcitriol
D. Parathyroid hormone

15. Normally, the thyroid gland secretes:
A. CGRP
B. PTH related peptide
C. TSH
D. calcitonin

16. Which of the following enzymes is not synthesized by the pancreas?
A. DNAase
B. Proelastase
C. Aminopeptidases
D. Pepsin

17. True about Ficks law of diffusion
A. A passive movement of molecule along concentration gradient
B. An active movement along the concentration gradient
C. An active movement against the concentration gradient
D. None of these

18. Which of the following is/are termed 'synthetic senses'?
A. Stereognosis
B. Two-point discrimination
C. Vibratory sensibility
D. All these

19. A human growth hormone variant (hGH-V) is expressed primarily in:
A. liver
B. spleen
C. kidney
D. placenta

20. In spinal anesthesia, which of the following is lost first?
A. Sympathetic tone
B. Sensation in the lower limbs
C. Motor function
D. Proprioception

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