Body chemicals that regulate sleep, moods, hunger, and stress are called hormones
<u>Explanation:</u>
These hormones are a type of proteins that are secreted in the body as in response to various activities that happen in a body. They do not have a separate pathway system they just flow along with the blood.
They serve as a communication tool between tissues. The glands which secrete these proteins are termed as endocrine glands. If these hormones affect the same cell they are called as autocrine and different cells are called as exocrine.
Answer:
At almost the opposite point on the Earth's surface, the "P" waves reappear. The shadow zone exists because the waves are refracted as they pass through the boundary between the mantle and the core and are diverted from their original paths.
Mitochondria is the powerhouse of the animal cell
