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Cardiovascular Adjustments in Exercise - Prof. Rajiv

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Cardiovascular Adjustments in Exercise - Prof. Rajiv

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Questions and Answers

What is the main purpose of cardiovascular adjustments during exercise?

To decrease blood flow to the brain

To deliver oxygen and nutrients to specific exercising muscles (correct)

To reduce blood pressure in critical organs

To increase blood flow to inactive tissues

What happens to muscle blood flow during exercise with more than 70% tension?

Blood flow decreases slightly

Blood flow remains constant

Blood flow stops completely (correct)

Blood flow is normal

Which of the following factors contribute to maintaining high blood flow during exercise?

Temperature decrease

Decrease in tissue PCO2

Increase in tissue PO2 (correct)

Decrease in vasodilator metabolites

What is a characteristic of isotonic exercises?

Include activities like walking and running Signup and view all the answers

What initiates the increase in heart rate during exercise?

Psychic stimuli acting on medulla and decrease in vagal tone Signup and view all the answers

What leads to dilation of arterioles and precapillary sphincters during exercise?

Accumulation of K and vasodilator metabolites Signup and view all the answers

What happens to SBP and DBP when stroke volume increases during exercise?

SBP rises sharply, DBP remains unchanged Signup and view all the answers

What is the effect of vasodilation on Total Peripheral Resistance (TPR) during exercise?

TPR falls due to vasodilation Signup and view all the answers

How does blood flow to contracting muscles change during exercise?

Blood flow to contracting muscle is reduced Signup and view all the answers

What happens to venous return during exercise?

Venous return increases due to various factors including muscle pump and vasoconstriction Signup and view all the answers

How does blood pressure change initially after exercise?

BP drops and then returns to normal due to vasodilation Signup and view all the answers

What local mechanisms help maintain high blood flow during exercise?

Arteriolar dilation and opening of closed capillaries Signup and view all the answers