Question

all endotherms regulate their temperature. endotherms are animals that regulate their bodies at a different temperature than the environment. you can think of mammals and birds as the most common endotherms.

· if your body temperature increases, then it will activate cooling mechanisms (sweating).
· if your body temperature decreases, then it will activate heating mechanisms (shivering)

this is a negative feedback loop, and it went against the change caused by a stimulus, and, hence, it assisted in maintaining homeostasis. but how?

question: was the stimulus increased or decreased?

· do not confuse the increase or decrease in body temperature with the stimulus. to answer this question, think about what the stimulus is...and then think about the response.
· if the stimulus was increased, then the feedback loop worked in one direction and magnified or enhanced the action of the stimulus.
· if the stimulus was decreased, then the feedback loop worked to reverse the stimulus and bring conditions back to its usual stable condition.

the stimulus increased.
the stimulus decreased.
the stimulus stayed the same.

Explanation:

Endotherms use negative - feedback loops to maintain homeostasis. When body temperature changes, the body responds to reverse the change. A negative - feedback loop works to reverse the stimulus to bring conditions back to normal. So the body is counter - acting the change in temperature (stimulus) to return to a stable state, meaning the stimulus is decreased.

Answer:

The stimulus decreased.