Which physiological response is due to a "positive feedback loop"?
a. body temperature regulation
b. blood pressure regulation
c. blood sugar regulation
d. blood loss regulation

Blood loss regulation

Explanation:

Positive feed back is response of body in which there is an increase in the effect of small disturbance and the effect is intensified on a system. The magnitude of the effect increases.

In case of blood loss the body releases clotting factors that helps in preventing the body from severe blood loss.

The body releases clotting factors and these clotting factors tend to release more and more clotting factors that begins the process of blood clotting in vessels.

This is an example of positive feedback which acts as a life saving cascade.