an alkaline watery fluid containing digestive enzymes, which is secreted into the mouth by...
Glossary
hormone
Subject:
- Life Sciences
a chemical messenger produced and released by a cell or a gland in one part of the body of the organism that affect cells in other parts of the organism. In essence, it is a chemical messenger that transports a signal from one cell to another. Only a small amount of hormone is required to alter cell metabolism. Hormones in animals are most often transported in the blood.