Hormones can be defined as chemical messengers which enhances communication between the body cells and carry out specific regulating functions.
Hormones are secreted in the endocrine gland and they can be classified based on their chemical nature, mechanism of action, nature of action and their stimulation in the endocrine gland.
hormone activates target cells in such a way that it diffuses through the target cell plasma membrane to bind to a receptor protein in the cytoplasm of the cell
