Question Detail
Question
Countercurrent heat exchange in penguins serves which physiological function?
Correct Answer
Option B is the correct answer.
Detailed Explanation
Countercurrent heat exchange is a physiological adaptation where warm arterial blood flowing to the extremities passes alongside cold venous blood returning to the body, transferring heat and minimizing heat loss. In penguins, this helps retain body heat in extremely cold aquatic environments.
Hint
This mechanism conserves heat by transferring warmth from outgoing to returning blood.