Question

Proper definition of Hormones and its characterstics

Answer 1

A chemical substance produced in the body that controls and regulates the activities of certain cells or organs is known as hormone.
Characteristics: 
1) Hormone are secreted by endocrine cells.
2) Hormones are chemical messengers.
3) Hormones donot catalyze any reactions.
4) They are secreted only when needed, they are not stored prior to requirement.
5) Hormones usually cause long term effects like change in behaviour , growth , etc..