Wk 7 - LE 13: Cardiovascular (Controlling BF)

Question 1

Achieving a steady MAP is by controlling the variation of ____ and ____

Answer 1

CO and TPR

Question 2

Every organ can control their own ______

Answer 2

Perfusion (blood flow)

Question 3

total blood known is known as

Answer 3

CO

Question 4

Most of the increase in CO is distributed to …?

Answer 4

Skeletal muscles (and some to skin and heart)

Question 5

Increases in regional blood flows are achieved mainly via decreases in…?

Answer 5

Vascular resistance in these regionals

Question 6

Most decrease in TPR is due to a decrease in _____ _______ in contracting muscle

Answer 6

vascular resistance

Question 7

Dilation/constriction is referring to the ….?

Answer 7

cross section diameter/radius of vessel

Question 8

Blood enters muscle in contraction or relaxation?

Answer 8

Relaxation

Question 9

What neurons affect vasoconstriction?

Answer 9

Sympathetic vascular neurons

Question 10

What 5 factors contribute to vasodilation in active muscle?

Answer 10

1) intramuscular pressure
2) muscle metabolites
3) endothelial (e.g. nitric oxide)
4) humoral (erythrocytes, adrenalin)
5) Thermal & other neurall

Question 11

The decline in TPR during graded exercise is linked mainly to …

Answer 11

a decrease in vascular resistance in contracting skeletal muscle