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physiology MCQs

Practise focused physiology questions with marked answers for exam preparation and subject revision.

physiology Mcqs
1. Surfactant is secreted by_____________?
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A. Goblet cells

B. Pnemocyte II

C. Pulmonary vessels

D. Pnemocyte I

2. Tetany is characterized by ________________?
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A. Increased serum calcium concentration

B. Hypotonicity of muscles

C. None of the above

D. Hypertonicity of muscles
3. Adrenaline used for controlling of bleeding during surgery may result in________________?
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A. Syncope

B. Drastic fall in blood pressure

C. Cardiac arrhythmias

D. Precipitation of allergic reaction

4. In which of the following diseases would you expect to find an increase in thickness of the respiratory membrane ?
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A. Skeletal abnormalities of the chest

B. Asthma

C. Emphysema

D. Pulmonary artery thrombosis

5. The catecholamines secreted by adrenal medulla______________?
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A. Are under the control of parasy

B. Decrease the level o free fatty acids and ketone bodies

C. Increases the blood glucose level by favoring glycogenolysis in blood and muscle cells

D. Increase the splanchnic blood flow

6. Which of the following does not stimulate alveolar hyperventilation ?
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A. Hypoxia

B. Stretching of airways

C. Hypercapnia

D. Acidosis

7. Small intestinal peristalsis is controlled by _______________?
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A. Myentric plexus

B. Vagus nerve

C. Meissners plexus

D. Parasympathetic

8. Osteoclasts are inhibited / modified and regulated by____________?
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A. Calcitonin

B. Parathyroid hormone

C. Tumor necrosis factor

D. 1,25 dihydroxycholecalciferols

9. All the following causes the secretion of gastric juice during cephalic phase EXCEPT______________?
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A. Food in the stomach

B. Sight of food

C. Food in the mouth

D. Thought of food

10. Cortisol levels are maximum during____________?
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A. Evening

B. Sleep

C. Have no change

D. Early morning
11. The intrapleural pressure at the end of deep inspiration is ______________?
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A. +4 mm Hg

B. -4 mm Hg

C. -18 mm Hg

D. #NAME?

12. Production of bile takes place in____________________?
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A. The gall bladder

B. Hepatic duct

C. Hepatocytes

D. Kupffer cells

13. The most important action of Secretin is to_____________?
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A. decrease gastric secretion

B. neutralize the acid from the stomach

C. increase secretion of bicarbonates by pancreas

D. Cause contraction of pyloric sphincter
14. Regarding myxedema the following are true except______________?
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A. Dullness, loss of memory

B. B.M.R increased by 30 -45%

C. Swollen, oedematous look of the face

D. Impotency, amenorrhea

15. Hypercalcemia associated with malignancy is most often mediated by _____________?
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A. Parathyroid hormone ( PTH)

B. Calcitonin

C. Parathyroid hormone related protein (PTHrP)

D. Interleukin 6 ( IL- 6)

16. Cephalic phase of gastric secretion can be demonstrated by the following experiment____________?
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A. Condition reflex

B. None of the above

C. Pavlovs pouch

D. Heidenhans pouch

17. Acromegaly is a disorder of____________?
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A. Excess FSH secretion

B. Excess thyroxine secretion

C. Excess ACTH secretion

D. Excess growth hormone secreting
18. Which is false regarding insulin______________?
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A. Causes lipogenesis

B. Secreted by beta cells

C. Promotes glycogenesis

D. Glycopeptide
19. Inhibit b hormone has effect on_______________?
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A. Spermatogenesis

B. Sertoli cells

C. FSH

D. Seminiferous tubules

20. Carbon monoxide poisoning causes_______________?
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A. Oxygen dissociation curve shifts to left

B. Cyanosis

C. Hypoxic hypoxia

D. Diffusion capacity of lungs decreases

21. Endocrine glands that are not influenced by the pituitary gland include the____________?
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A. Pancreas, adrenal medulla and thyroid gland

B. Adrenal cortex, parathyroids and ovaries

C. Adrenal medulla, parathyroids, and the islets of langerhans

D. Thyroid gland, testes , and adrenal medulla

22. Contraceptive action of combined pill is mainly due to_______________?
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A. Prevents the implantation of fertilized egg

B. Decrease in tubal motility

C. Inhibits ovulation

D. Prevents the fertilization

23. A child with stunted growth with a stuffed belly, and short stature with mental retardation is suffering from the deficiency of which of the following______________?
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A. Parathyroid

B. Growth hormone

C. Rickets

D. Thyroxine
24. Fertilized ovum usually gets attached to the uterus wall in ____________?
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A. 28 days

B. 14 days

C. 1 week

D. 8 weeks

25. The primary site of action of antidiuretic hormone is on the_______________?
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A. Osmoreceptors in the hypothalamus

B. Afferent arterioles of the glomeruli

C. Thirst center in the hypothalamus

D. Distal tubules and collecting ducts in the kidney
26. Due fear which of the following hormones increases rapidly _______________?
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A. Epinephrine

B. Thyroid hormone

C. Corticosteroid

D. Growth hormones

27. The hormone whose deficiency causes diabetes insipidus is released from which nucleus of pituitary ________________?
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A. Suprachiasmatic

B. Pre optic

C. Paraventricular

D. Supraoptic
28. Inability of exchange of oxygen through lung tissue if known as____________?
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A. Ischemic hypoxia

B. Anoxic anoxia

C. Histotoxic hypoxia

D. Anoxia

29. In children, hypothyroidism causes_____________?
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A. Gigantism

B. Myxodedema

C. Cretinism

D. Acromegaly

30. Low calcium level will cause_____________?
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A. Tetanus

B. All of the above

C. Hyper excitability of wrist muscle

D. Weak heart action

31. The primary effect of calcitonin is__________________?
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A. Increases intestinal absorption of calcium

B. Bone resorption

C. Decreases intestinal absorption of calcium

D. Bone deposition
32. Gastric secretion is stimulated by all the following except_____________?
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A. Gastrin

B. Vagal stimulus

C. Secretin

D. Gastric distension

33. Secretin is secreted by_____________?
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A. Pancreas

B. Duodenum

C. Stomach

D. Liver

34. A child is below the third percentile for height. Growth velocity is normal, but chronologic age is more than skeletal age. The most likely diagnosis is______________?
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A. Primordial dwarfism

B. Constitutional delay in growth

C. Genetic short stature

D. Hypopituitarism

35. Vasopressin is synthesized in the_____________?
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A. Juxtaglomerular apparatus

B. Hypothalamus

C. Vasomotor center

D. Anterior pituitary

36. Blood coagulation is impaired in___________?
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A. Rickets

B. Hyperparathyrodism

C. Tetany

D. None

37. The quantity of water lost in expired air each 24 hrs is about___________?
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A. 600 ML

B. 200 ML

C. 400 ML

D. 800 ML

38. Arterial PO2 is reduced in_____________?
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A. KCN poisoning

B. CO poisoning

C. Pulmonary hypoventilation

D. Anemia

39. In Haldane effect CO2 dissociation curve is shifted to_____________?
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A. Right

B. Left

C. None of the above

D. Does not shift

40. Posterior pituitary insufficiency leads to______________?
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A. Cretinism

B. Diabetes insipidus

C. Dwarfism

D. Diabetes mellitus

41. Normal intrapleural pressure during the start of inspiration is _________ mm of Hg?
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A. -5

B. 0

C. -7

D. -2
42. Oxygen dissociation curve shifts to the right by all of the following except_____________?
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A. Rise in pH

B. Rise in H+ ion

C. Rise in temperature

D. Rise in carbon dioxide tension

43. IN the adrenal gland, androgens are produced by the cells in the____________?
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A. Zona glomerulosa

B. Medulla

C. Zona reticularis

D. Zona fasciculata

44. The work of breathing__________________?
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A. decreased in lying posture

B. is not affected by respiratory

C. is inversely related to lung compliance

D. remains constant during exercise

45. The most significant immediate result of lowered serum calcium is_______________?
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A. Decalcification of bones

B. Weakened heart action

C. Hyperirritability of nerves and muscles

D. Decalcification of teeth

46. Steroid hormones are believed to enter target cells via_______________?
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A. Carrier mediated endocytosis

B. Facilitated diffusion

C. Simple diffusion

D. Cholesterol lined pores in the plasma membrane

47. which of the following secretions has a very high pH________________?
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A. Saliva

B. Pancreatic juice

C. Bile in gall bladder

D. Gastric juice

48. Vital capacity is a measure of________________?
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A. Expiratory reserve volume plus reserve volume

B. Tidal volume

C. Inspiratory reserve volume plus expiratory volume

D. Tidal volume plus inspiratory reserve volume plus expiratory reserve volume
49. Shift of the oxygen dissociation curve to right is caused by the following factors EXCEPT_______________?
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A. Increased concentration of oxygen

B. Increased 2,3 BPG

C. Increased temperature

D. Increased concentration of carbon di oxide

50. Changes in biological activity occurring daily are referred as _________ rhythm?
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A. Circa sestin

B. Circannual

C. Circa triginatan

D. Circadian