Adaptations for cold survival

Question 1

Explain how antifreeze compounds work.

Answer 1

Body fluids must be above freezing point to allow chemical reactions to occur
Genes in cells contain codes for them, and are released into body

Question 2

2 other cold survival adaptations

Answer 2

Migration

Burrowing

Question 3

Explain what happens to the mountain pygmy possum when it hibernates

Answer 3

It collects and hides food for winter

During winter, it hibernates: heart and breathing rate and metabolic rate drop; body temp drops by 30 degrees,

Question 4

Explain how insulating layers of feathers, fat and/or fur help animals maintain body temperature

Answer 4

They trap a layer of heat to the skin, thus maintaining body temp.

Question 5

Describe the countercurrent exchange system.

Answer 5

Arteries carry blood away from heart - warm
Veins carry blood to heart - cold
As they are situated close together and have connecting blood vessels, they transfer heat: keeps organs and muscles warm whilst reducing heat loss.