How do polar bears maintain homeostasis in freezing cold weather?

Question

Responses

Their thick fur retains heat.
Their thick fur retains heat.

Their metabolism slows down to preserve heat.
Their metabolism slows down to preserve heat.

Their thick skin insulates the internal organs against the cold.
Their thick skin insulates the internal organs against the cold.

Their metabolism speeds up to produce heat.
Their metabolism speeds up to produce heat.

Answer 1

Polar bears maintain homeostasis in freezing cold weather primarily through several adaptations:

1. Thick Fur: Their dense fur traps air, providing insulation and retaining heat.

2. Layer of Fat: Beneath their skin, polar bears have a thick layer of blubber (fat) that insulates their bodies against cold temperatures and provides energy reserves.

3. Metabolism: Polar bears have a high metabolism that generates heat. While they may not slow their metabolism in extreme cold as some animals do, they can adjust their energy expenditure based on food availability and environmental conditions.

4. Body Size and Shape: Their large body size reduces surface area to volume ratio, minimizing heat loss.

5. Behavioral Adaptations: Polar bears may also use behavioral strategies, such as curling up to reduce exposed surface area or seeking shelter from the wind.

Overall, it's a combination of these factors that helps polar bears maintain homeostasis in their harsh Arctic environments.

Answer 2

what is the answer

Answer 3

The correct response regarding how polar bears maintain homeostasis in freezing cold weather is:

Their thick fur retains heat.

This is one of the primary adaptations they have for insulation against the cold. Additionally, their layer of fat also plays a crucial role in retaining heat, but from the options given, the focus on thick fur is the most relevant.

Note: Polar bears do not typically slow their metabolism to preserve heat; rather, they have a high metabolism that can increase heat production.