Physiology MCQs

Page No. 2

Under resting condition the cardiac output is _______ L/ min ?


a2.5


b4.25


c5.25


d9.5


View Answer 5.25

Cardiac output in L/min divided by heart rate equals_______________?


aCardiac efficiency


bCardiac index


cMean stroke volume


dMean arterial pressure


View Answer Mean stroke volume

First heart sound occurs during the period of________________?


aIsotonic relaxation


bIsovolumetric relaxation


cIsovolumetric contraction


dIsotonic contraction



The effects of Adrenaline on heart are all except__________________?


aIncreases heart rate


bDecreases myocardial irritability


cIncreases force of contraction


dIncreases oxygen uptake by heart



Increase in carotid sinus pressure produces__________________?


aReflex hyperpnea


bReflex Hypercapnia


cReflex tachycardia


dReflex Hypercapnia


View Answer Reflex Hypercapnia

SA node acts as a pacemaker of the heart because of the fact that it_________________?


ais capable of generating impulses


bHas rich sympathetic innervation


cHas poor cholinergic innervation


dGenerates impulses at the highest rate



The following factors increase the cardiac output except______________?


aPreload


bAfter load


cHeart rate


dMyocardial contractility


View Answer After load

In determining blood pressure by auscultatory method_____________?


aThe loudest sound is the diastolic pressure


bSystolic pressure estimation tends to be lower than those make by palpatory method


cThe first sound heard is the systolic pressure


dThe sounds that are heard are generated in heart



Glomerular capillary pressure differ from other capillaries of body in______________?


aHigher filtration pressure


bLower filtration pressure


cBoth of the above


dNone



Which of the following increases turbulence in blood flow ?


aReynolds number < 2000


bDecrease in velocity of blood


cDecrease in density of blood


dIncrease in diameter of blood vessel



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