ANATOMY

Detailed explanation-1: -In negative feedback, a stimulus elicits the release of a hormone that produces a response, and once the response reaches a certain level, it sends a signal that stops additional release of the hormone. In this way, the concentration of hormones in blood is maintained within a narrow range.

Detailed explanation-2: -When hormone levels reach a certain normal amount in the blood, the endocrine system has a built-in turnoff process. It is called negative feedback system .

Detailed explanation-3: -Hormonal stimuli refers to the release of a hormone in response to another hormone. A number of endocrine glands release hormones when stimulated by hormones released by other endocrine glands. For example, the hypothalamus produces hormones that stimulate the anterior portion of the pituitary gland.

Detailed explanation-4: -Endocrine glands release hormones into the bloodstream. This lets the hormones travel to cells in other parts of the body. The endocrine hormones help control mood, growth and development, the way our organs work, metabolism, and reproduction. The endocrine system regulates how much of each hormone is released.

Detailed explanation-5: -Endocrine glands secrete hormones directly into the bloodstream. The hormones dissolve in plasma and travel the circulatory pathways through various body tissues. So why do hormones affect only their target cells in particular tissues? Because only those target cells have receptors for that particular hormone.