Physiology MCQs

Page No. 2

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


a2.5

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b4.25

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c5.25

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d9.5

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View Answer 5.25

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


aCardiac efficiency

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bCardiac index

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cMean stroke volume

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dMean arterial pressure

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View Answer Mean stroke volume

First heart sound occurs during the period of________________?


aIsotonic relaxation

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bIsovolumetric relaxation

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cIsovolumetric contraction

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dIsotonic contraction

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The effects of Adrenaline on heart are all except__________________?


aIncreases heart rate

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bDecreases myocardial irritability

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cIncreases force of contraction

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dIncreases oxygen uptake by heart

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Increase in carotid sinus pressure produces__________________?


aReflex hyperpnea

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bReflex Hypercapnia

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cReflex tachycardia

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dReflex Hypercapnia

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View Answer Reflex Hypercapnia

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


ais capable of generating impulses

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bHas rich sympathetic innervation

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cHas poor cholinergic innervation

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dGenerates impulses at the highest rate

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The following factors increase the cardiac output except______________?


aPreload

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bAfter load

✓


cHeart rate

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dMyocardial contractility

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View Answer After load

In determining blood pressure by auscultatory method_____________?


aThe loudest sound is the diastolic pressure

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

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cThe first sound heard is the systolic pressure

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dThe sounds that are heard are generated in heart

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Glomerular capillary pressure differ from other capillaries of body in______________?


aHigher filtration pressure

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bLower filtration pressure

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cBoth of the above

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dNone

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Which of the following increases turbulence in blood flow ?


aReynolds number < 2000

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bDecrease in velocity of blood

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cDecrease in density of blood

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dIncrease in diameter of blood vessel

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