CBME
DR. YSR UNIVERSITY OF HEALTH SCIENCES:AP:VIJAYAWADA-520 008
MBBS DEGREE EXAMINATION – MAY, 2022
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FIRST M.B.B.S. EXAMINATION
PHYSIOLOGY – PAPER-I (SET-B)
(Multiple Choice Questions)
Time: 20 Minutes Max Marks: 20
Note: Answer all questions
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SECTION – I (MCQs- 20 MARKS) 1x20=20
1) Equilibrium potential of an ion is calculated by
a. Goldman equation
b. Katz equation
c. Gibbs-Donnan equilibrium
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d. Nernst equation
2) Which of the following increases the diffusion of a substance across the membrane
a. Increase the size of the particle
b. Thickness of the membrane
c. Increases lipid solubility of the substance
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d. Decreased lipid solubility of the substance
3) D2O (Deuterium oxide) is used to measure volume of
a. Total body water
b. Extracellular fluid
c. Blood
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d. Intracellular fluid
4) Resting membrane potential of neuron is equal to equilibrium potential of
a. Bicarbonate
b. Chloride
c. Sodium
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d. Potassium
5) The cardiac output can be determined by all EXCEPT
a. Thermodilution technique
b. Fick's principle
c. V/O ratio
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d. Echocardiography
6) Which of the following is not a cell adhesion molecule
a. Integrin
b. Spectrin
c. Cadherin
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d. Selectin
7) Sympathetic stimulation causes all of the following EXCEPT
a. Increase in venous capacitance
b. Increase in heart rate
c. Increase in blood pressure resistance
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8) At rest, contribution of atrial systole of ventricular filling is about:
a. 20%
b. 80%
c. 50%
d. 65%
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9) Functional residual capacity is:
a. Tidal volume + volume expired by forced expiration
b. Volume remaining after forced expiration
c. Tidal volume + volume inspired forcefully
d. Volume remaining after normal expiration
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10) Hematocrit is 25% less in capillary blood compared to whole body hematocrit, due to
a. Less blood in capillaries
b. Less proteins in capillary blood
c. More water in capillary blood
d. Less cells in capillary blood due to plasma skimming
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11) All are true about dead space EXCEPT
a. This is the space occupying conducting Airways that does not take part in gas exchange
b. Normally about 30% of minute ventilation does not participate in gas exchange
c. Dead space is also called as anatomical Dead Space normal
d. Dead Space volume is 350 mL
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12) The total cross-sectional area is more in which part of circulation
a. Arteries and arterioles
b. Capillaries
c. Vena cava and bigger veins
d. Aorta and bigger arteries
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13) In an adult, at sea level the normal p50 occur at what level of PO2
a. 15 mmHg
b. 95 mmHg
c. 27 mmHg
d. 60 mmHg
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14) Which of the following is NOT true about pulmonary circulation
a. It is a low pressure circulation having MAP of about 15 mmHg
b. It is a low resistance circulation having less vascular resistance
c. Pulmonary arterioles are thin walled having less smooth muscle in intima media
d. The resting sympathetic tone is high
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15) Which of the following does not stimulate gastrin secretion
a. Increased acid in the stomach
b. Products of protein digestion
c. Gastric distinction
d. Vaginal stimulation
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16) The partial pressure of oxygen in venous blood is:
a. 40 mmHg
b. 46 mmHg
c. 32 mmHg
d. 95 mmHg
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17) Which of the following intestinal movements is for mixing and grinding of intestinal content:
a. Villous contraction
b. Migrating motor complex
c. Peristalsis
d. Segmentation
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18) Pancreatic juice rich in water and electrolytes poor in enzymes is secreted in response to
a. Pancreozymin
b. Proteins
c. Cholecystokinin
d. Secretin
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19) Vitamin B12 is absorbed in
a. Stomach
b. Duodenum
c. Jejunum
d. Ileum
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20) All of the following are true about achalasia cardia EXCEPT
a. Failure of LES to constrict is the major problem in this disorder
b. Rat tail in barium X ray is a typical finding
c. Deficiency of myenteric plexus at LES is the cause
d. Neurotransmitter VIP and NO are deficient
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