ANATOMY

Detailed explanation-1: -The target cells for each hormone are characterized by the presence of certain docking molecules (i.e., receptors) for the hormone that are located either on the cell surface or inside the cell.

Detailed explanation-2: -Target cells are cells that are receptive to a secreted hormone. Target cell activation is. dependent on three factors; the hormone levels in the blood, the receptor levels on the target cell, and hormone–receptor affinity.

Detailed explanation-3: -Target cells are capable of responding to hormones because they display receptors to which the circulating hormone can bind. In this way, hormones only affect a limited number of cells even though they are transported in the bloodstream throughout the body.

Detailed explanation-4: -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-5: -A hormone interacts only with certain target cells, cells that recognize the hormone’s chemical structure. A hormone and its target cell t together the way a key ts into a lock. The endocrine glands include the hypothalamus, pituitary, thyroid, parathyroid, adrenal, thymus, and pancreas.