AP PSYCHOLOGY

Detailed explanation-1: -The secretory products of endocrine glands are called hormones and are secreted directly into the blood and then carried throughout the body where they influence only those cells that have receptor sites for that hormone.

Detailed explanation-2: -The chemical product of an endocrine gland is called a hormone. Hormones turn on, turn off, speed up, or slow down the activities of different organs and tissues. You can think of a hormone as a chemical messenger. Hormones are carried throughout the body by the blood.

Detailed explanation-3: -The endocrine glands release certain chemicals called hormones. Hormones (so-called “chemical messengers") produced by endocrine glands enter the capillaries (and lymph vessels) of the blood circulatory system.

Detailed explanation-4: -Hormones act as chemical messengers that are released into the blood stream to act on an organ in another part of the body. Although hormones reach all parts of the body, only target cells with compatible receptors are equipped to respond. Over 50 hormones have been identified in humans and other vertebrates.