Exercise phys

Question 1

Neural factors of exercise

Answer 1

Central command
Reflexes originating in contracting muscle
Baroreceptor reflex

Question 2

CCentral command

Answer 2

Feedforward mechanism that readies the body for exercise

Question 3

Anticipation of exercise initiates

Answer 3

Increased sympathetic activity

Decreased parasympathetic activity

Question 4

What happens to total peripheral resistance during exercise

Answer 4

Decrease due to vasodilation

Question 5

Why does total blood volume decreased during exercise

Answer 5

Fluid loss by sweating and from capillary to interstitial fluid levels

Question 6

What is the major factor limiting exercise performance?

Answer 6

Oxygen supply to the tissues

Question 7

What can limit oxygen supply?

Answer 7

Cardiac output
Oxygen extraction in lungs
Oxygen utilization in muscles

Question 8

What is the major factor that limits oxygen supply to the tissues?

Answer 8

Pumping action of the heart