Exercise Physiology

Question 1

4 Ways in which heat loss can occur

Answer 1

conduction, convection, radiation + evaporation.

Question 2

Conduction

Answer 2

heat exchanged by two objects in contact.

Question 3

Convection

Answer 3

heat exchanged by contact with fluid that is flowing.

Question 4

Radiation

Answer 4

occurs when heat is transferred from a warmer body to the cooler surroundings without physical contact.

heat loss = occurs when core temp is higher than ambient temp

heat gain = occurs when ambient temp is higher than core temp

Question 5

Evaporation

Answer 5

the cooling of the body as a result of the vaporisation of sweat. (most effective in dry conditions)

Question 6

Dehydration

Answer 6

occurs when the amount of water leaving the body is greater than the amount being taken in.

Question 7

Heat acclimatisation

Answer 7

when heat tolerance is improved by repeated exposure to hot environments.

Question 8

Exercising in cold weather

Answer 8

athletes will use more glycogen and fats due to shivering using them as a fuel source. this will have a negative impact on performance as glycogen stores will deplete earlier in the event.
- increase amount of CHO and fats in diet.

Question 9

Physiological response to cold weather

Answer 9

peripheral vasoconstriction, shivering, piloerection

Question 10

Peripheral vasoconstriction

Answer 10

involves the redirection of blood flow, away from the skins surface and towards the bodies core, to help minimise heat transfer from the blood to the cold external environment.

Question 11

Shivering

Answer 11

involuntary muscular contractions designed to help increase heat production.

Question 12

Piloerection

Answer 12

when the hairs on the body stand on end and trap a warm layer of air close to the skin to help keep the skin surface warm.