Thermoregulation

Question 1

Poikliothermic

Answer 1

Dependent on ambient environmental temperature for function
In active in cold
Seek shelter in heat
Benefits are slower metabolic rate in extreme conditions

Question 2

Homeothermic

Answer 2

Function in a wide range of temperatures, but have high metabolic cost

Question 3

What can effect normal body temperatures?

Answer 3

age: reserve capacity
sex: hormones
breed: adaptions
Time of day: Hot/cold day
Behavior: exercise
Hydration: Ability to use evaporative cooling
Reproductive status: Lactation can increase metabolic rate and hormones
Site of measurement: different heat gradients through out the body

Question 4

Define frostbite

Answer 4

Circulation to the peripheral tissue shuts down to retain body temperature.

Question 5

Describe cooling adaptions of the brain

Answer 5

close to capillary beds (vascular plexus) to nasal cavity heat exchange = large amount of blood flow for heat exchange

Question 6

What happens during panting

Answer 6

Air is moved through a moist environment allowing evaporative cooling to occur (no gas is exchanged)

Question 7

What organ produces the most heat?

Answer 7

The brain, as it consumes the most glucose (pure energy)