Chemicals are released to indicate thirst. Muscles make lactic acid. Breathing rate increases. Perspiration occurs.
I gave my students this multiple choice question: Which action by the body best releases heat and cools the body during and after exercising?

Only one answer is correct among these 4 choices:
- Chemicals are released to indicate thirst.
- Muscles make lactic acid.
- Breathing rate increases.
- Perspiration occurs.

Could you tell me which one is correct?

Perspiration occurs.