Thermoregulation

Question 1

What is thermoregulation?

Answer 1

Maintenance of body temperature within a range that enables cells to function efficiently.

Question 2

What happens if thermoregulation fails?

Answer 2

• proteins denature

- intracellular fluids and organelles freeze

Question 3

Surface area is…

Answer 3

Critical to heat exchange

Question 4

Ectotherms

Answer 4

• cold blooded

- depend on air temperature to regulate metabolism rate/ activity

Question 5

Endotherms

Answer 5

• warm blooded
• constant body temperature regardless of environment
• increase rate of cellular respiration to generate heat

Question 6

Thermoregulation endothermic feedback loop:

Answer 6

Sensor: use thermoreceptors on the skin and within the body to alert the nervous system

Integrator: hypothalamus integrates information and initiates appropriate response

Effectors:
Temperature drop- vasoconstriction, shivering, goose bumps
Temperature increase- vasodilation,sweat