11. Thermoregulation + Acute CV responses

Question 1

Define thermoregulation

Answer 1

The maintenance of body temperature

Question 2

List the 3 mechanisms the body uses to control temperature

Answer 2

Sweating, shivering and redistribution of blood flow to the skin and around the body.

Question 3

Describe hyperthermia

Answer 3

When the body get too hot

Question 4

Describe how the body deals with hyperthermia

Answer 4

Increased blood flow to the skin in order to get closer to the cooler air, increased sweat rate and evaporation of the sweat from the surface of the skin which cools the body.

Question 5

Describe hypothermia

Answer 5

When the body gets too cold

Question 6

Describe how the body deals with hypothermia

Answer 6

• Shivering creates heat via aerobic respiration
• Redistribution of blood flow away from the extremities and towards the major organs to sustain their function and keep the blood warmer.

Question 7

List the acute cardiovascular responses to exercise

Answer 7

Increased HR, SV, Q, AV02 difference and systolic blood pressure. Decreased blood volume (Plasma) and blood flow redistribution

Question 8

Define AV02 Difference

Answer 8

The difference in the amount of oxygen in the arteries and the veins.