Physiology MCQs

Page No. 4

Stimulation of barorceptor leads to ________________?


aIncreased blood pressure, increased heart rate


bDecreased B.P , decreased heart rate


cIncreased B.P, decreased heart rate


dDecreased B.P, increased heart rate



Cardiac index is related to ______________?


acardiac output and body weight


bCardiac output and body surface area


cCardiac output and work of the heart


dStroke volume and pulse rate



Closure of aortic valve occurs before the following event_______________?


aIsovolumetric contraction


bIsovolumetric relaxation


cPre-diastole


dPre-systole



Fastest conducting tissue in human heart _________________?


aAV node


bSA node


cBundle of His


dPurkinje fibers


View Answer Purkinje fibers

Coronary blood flow is usually predominantly controlled by_____________?


aAuto regulation


bHormones


cParasympathetic impulses


dSympathetic impulse


View Answer Auto regulation

Cardiac cycle duration in man is_______________?


a0.4 seconds


b0.8 seconds


c1.2 seconds


d1.6 seconds


View Answer 0.8 seconds

Absolute period when whole heart is in diastole is______________?


a0.7 seconds


b0.3 seconds


c0.7 seconds


d0.4 seconds


View Answer 0.4 seconds

Cardiac output is maximum to _________________?


aLiver


bBrain


cKidney


dHeart


View Answer Liver

Effect on force of contraction of heart is_____________?


aChronotropic effect


bDromotropic effect


cBathmotropic


dIonotropic effect


View Answer Ionotropic effect

Distribution of blood flow is mainly regulated by the________________?


aArteries


bArterioles


cCapillaries


dVenules


View Answer Arterioles

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