Question

What are the chemical substances that act like chemical messengers?

Answer 1

• Hormones are the body’s chemical messengers
• The human body secretes and circulates some 50 different hormones. A wide variety of these chemical substances are produced by endocrine cells, most of which are in glands.
• The hormones then enter the blood system to circulate throughout the body and activate target cells.
• The endocrine system, tightly linked to the nervous system, controls a large number of the body’s functions: metabolism, homeostasis, growth, sexual activity, and contraction of the smooth and cardiac muscles.