Temperature regulations in ectotherms (behavioural/physiological)

What behaviours do they display related to the Sun? (B)

Behaviours to increase/reduce radiation absorbed from the Sun

How can they increase their body temp? (B)

Through conduction by pressing their bodies against the warm ground

How do they get warmer? (B)

Exothermic metabolic reactions

What else do they do in the Sun? (B)

Bask in the Sun, orientate their bodies so the maximum SA is exposed to the Sun, even extend areas of their body to increase SA exposed to Sun

What happens with dark colours compared to light colours?

Dark colours absorb more radiation than light colours. Colder environments usually means darker coloured to get warmer

Why do ectotherms alter their heart rate?

To increase/decrease metabolic rate and to affect the warming or cooling across the body surfaces

What is the heat loss centre for controlling thermoregulation?

Activated when the temp of blood flowing through the hypothalamus increases. It sends impulses through the autonomic motor neurones to effectors in the skin and muscles, triggering responses to lower core temp

What is the heat gain centre in controlling thermoregulation?

Activated when temp of the blood flowing through the hypothalamus decreases. It sends impulses through the autonomic nervous system to effectors in the skin and muscles, triggering responses to raise core temperature