Question

1. countercurrent heat exchange is a circulatory adaptation that helps mammals maintain appropriate body temperature in their extremities. a true b false

Explanation:

Counter - current heat exchange is a well - known physiological mechanism in mammals. Arterial and venous blood flow in opposite directions in the extremities, allowing heat transfer from warm arterial blood to cooler venous blood. This helps in conserving heat and maintaining appropriate body temperature in the extremities.

Answer:

A. True