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Physiology

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Cardiovascular System

Question
10 out of 19
 

All are increased during exercise except;



A Cardiac output

B Venous return

C Coronary blood flow

D Peripheral vascular resistance

Ans. D Peripheral vascular resistance

Changes in Exercise: ­

a. There is a net fall in total peripheral resistance due to vasodilation in exercising muscle.Vasodilation is due to local changes tissue Po2, tissues Pco2,-c K+ and temperature that maintaing a high blood flow.

b. CoP increases from 5.9 L/min at resting to 24L/min in exercise

c. Blood flow increase in: ­

i. Heart Q (250 ml/min to 1000 ml/min)

ii.Active skeletal (650ml/rnin to 28, 850 ml/min)

d. Blood flow remains unchanged in: ­

i. Brain Q and

ii. Skin

e. Blood flow decreased in ­

i. Kidney Q, Liver Q, GIT Q. Etc (3100ml/rnin, to 600 ml/min)

ii. inactive skeletal muscle Q (650ml/rnin to 300 ml/min)

f. There is a great increase in venous returns

Cardiovascular System Flashcard List

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