Key Terminology In The Vascular Shunt Mechanism

Question 1

Define the vascular shunt mechanism

Answer 1

The redistribution of cardiac output during exercise

Question 2

Define chemoreceptors

Answer 2

Monitor chemical changes in the body during exercise and during recovery

Question 3

Define baroreceptors

Answer 3

Monitor blood pressure increases during exercise and decreases during recovery

Question 4

Define proprioceptors

Answer 4

Detect increases in muscle activity during exercise and decreases demurring recovery

Question 5

Define vasomotor control centre (VCC)

Answer 5

Situated in the brain and controls the vascular shunt mechanism

Question 6

Define sympathetic stimulation

Answer 6

Sympathetic stimulation controls the diameter of arteriolar and pre-capillary sphincters. Increase = vasoconstriction. Decrease = vasodilation

Question 7

Define arteriole

Answer 7

Small arteries that carry oxygenated blood towards the muscles and organs. Has a muscular middle layer to allow for vasoconstriction and vasodilation

Question 8

Define pre-capillary sphincters

Answer 8

A small ring shaped muscle between the arteriole and capillaries that can vasoconstrict and vasodilate

Question 9

Define vasodilation

Answer 9

Vasodilation is a decrease in sympathetic stimulation that causes widening of the diameter of the arteriole and pre-capillary sphincters

Question 10

Define vasoconstriction

Answer 10

Vasoconstriction is an increase in sympathetic stimulation that causes a narrowing in the diameter of the arteriole and pre-capillary sphincters