Endo/Ectotherms

Question 1

Explain ‘Osmoregulation’. (Points/Brief).

Answer 1

• maintain salt and water balance.
• detected by osmoreceptors.
• neurosecretory cells produce less ADH.
• kidneys retain less water and from urine.

Question 2

What is the main purpose of Glucoregulation?

Answer 2

To maintain glucose homeostasis.

Question 3

Explain the term ‘Ectotherm’.

Answer 3

Cold-blooded… Body temperature varies depending on the temperature of its surroundings.

Question 4

Explain the term ‘Endotherm’.

Answer 4

Warm-blooded… Generates heat to maintain body temperature.

Question 5

List 3 advantages of endothermic animals.

Answer 5

• don’t have to rely on external temperature to keep a constant temperature.
• can perform normal activities.
• ability to span across different environments.

Question 6

List 2 disadvantages of endothermic animals.

Answer 6

• high energy use of the body to maintain heat.

- need to eat to get energy.

Question 7

List 2 advantages of ectothermic animals.

Answer 7

• decreased maintenance needed by the body.

- need for resources, very low metabolic rate.