ANATOMY

Detailed explanation-1: -Hormones travel throughout the body, either in the blood stream or in the fluid around cells, looking for target cells. Once hormones find a target cell, they bind with specific protein receptors inside or on the surface of the cell and specifically change the cell’s activities.

Detailed explanation-2: -Hormones are transported from the place of origin to the target cells through the blood. Each hormone acts upon only those cells which have specific receptors.

Detailed explanation-3: -Hormones are powerful messenger molecules that control essential body functions by carrying messages from endocrine glands to target cells and tissues.

Detailed explanation-4: -So why do hormones affect only their target cells in particular tissues? Because only those target cells have receptors for that particular hormone. Some hormones bind to receptors on the surface of target cells. Others enter the cells and bind to receptors in the cytoplasm or nucleus.