15.2 Thermoregulation In Ectotherms

Question 1

What type did animals are ectotherms and what does this mean

Answer 1

All invertebrates

Use surrounding to warm their bodies

Question 2

What animals are endotherms and what does this mean

Answer 2

Mammals and birds

They rely on metabolic processes to warm up and have a stable core body temp

Question 3

How do ectotherms regulate their temperature

Answer 3

Use adapted behavioural responses

Question 4

What behavioural responses do ectotherms use to warm up

Answer 4

Bask in sun
Orientate body so max SA is in sun
Conduction - press bodies against warm surfaces
Exothermic metabolic reactions

Question 5

What behavioural responds do ectotherms use to cool down

Answer 5

Shelter from sun
Press bodies against cool shaded stones
Minimise movement

Question 6

What are ectotherms physiological responses for warming up

Answer 6

Dark colours absorb more radiation

They alter their heart rate to control metabolic activity