physiology MCQs – Page 23

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

physiology Mcqs

441. Activation of which one of the following coagulation factors is not essential for hemostasis________________?
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A. X

B. IX

C. XI

D. XII

442. Normal prothrombin time is____________?
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A. 30 sec

B. 10-20 sec

C. 5-7 sec

D. 1 min

443. T- lymphocytes function to______________?
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A. Lymphokine production and delayed hypersensitivity

B. Immediate hypersensitivity

C. Complement activation

D. Antibody production

444. The most outer covering of nerve fibres is called as____________?
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A. Axolemma

B. Myelin sheath

C. Perineurium

D. Neurolemma

445. The kidney secrete all of the following hormones except_____________?
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A. Erythropoietin

B. Vasopressin

C. Renin

D. 1,2,5 Dihydroxy cholecalciferol

446. primary cause of bleeding disorder in liver damage is due to______________?
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A. Decreased level of prothrombin

B. Lack of vitamin B

C. Platelet deficiency

D. Lack of vitamin K

447. _________ is an example for rapidly acting neurotransmitter?
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A. Substance P

B. Somatostatin

C. Calcitonin

D. Glycine

448. The normal adult value of urine output________________?
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A. 2 l/day

B. 3 l/day

C. 0.5 l/day

D. 1.5 l/day

449. Epicrritic perception of pain occurs at the level of______________?
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A. Thalamus

B. Pulvinar

C. Area 3,1,2

D. Areas 5,7

450. Which of the following events DO NOT occur in rods in response to light_______________?
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A. Decreased intracellular cGMP

B. Activation of transducin

C. Structural changes in rhodopsin

D. Opening of Na+ channels

451. Increase in threshold level on applying subthreshold, slowly rising stimulus is known as ___________?
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A. Adaptation

B. Accommodation

C. Refractoriness

D. Electrotonus

452. Hemostasis depends upon all the following, EXCEPT_______________?
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A. Prothrombin

B. Vitamin B

C. Vitamin K

D. Calcium

453. In human the Hb is_______________?
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A. HbA

B. HbS

C. HbM

D. HbH

454. The conversion of prothrombin to thrombin, the factor participate along with calcium is______________?
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A. Fibrin

B. Stable factor

C. Labile factor

D. Thromboplastin

455. Preganglionic parasympathetic fibers are_______________?
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A. Sympathetic

B. Somatic only

C. Parasympathetic

D. Cholinergic

456. Under resting condition the cardiac output is _______ L/ min ?
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A. 4.25

B. 5.25

C. 2.5

D. 9.5

457. Ventricular muscle receives impulses directly from the_______________?
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A. Right and left bundle branches

B. Bundle of HIS

C. Purkinje system

D. AV node

458. Absolute refractory period in heart______________?
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A. Longer than refractory period in skeletal muscle

B. Lasts till cardiac contraction

C. All of the above

D. A phase of cardiac cycle in which heart cannot be stimulated by any amount of stimulus

E. Corresponds with duration of action potential

459. The first heart sound is produced by the_____________?
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A. Closure of the mitral and tricuspid valves

B. Closure of the aortic and pulmonary valves

C. Opening of the mitral and tricuspid valves

D. Opening of the aortic and pulmonary valves

460. Which of the following increases turbulence in blood flow ?
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A. Decrease in density of blood

B. Decrease in velocity of blood

C. Reynolds number < 2000

D. Increase in diameter of blood vessel

Showing 441 to 460 of 522 mcqs