ANATOMY

Detailed explanation-1: -For example, testosterone is part of a negative feedback mechanism that inhibits GnRH release by the hypothalamus and LH release by the pituitary. In addition, the Sertoli cells secrete a substance called inhibin, which prevents FSH release from the pituitary.

Detailed explanation-2: -The thyroid gland is regulated by a negative feedback loop. The loop includes the hypothalamus and pituitary gland in addition to the thyroid.

Detailed explanation-3: -Hormones are conveyed throughout the body by blood and pumped throughout the circulatory system. Hormones can have the ability to govern activity in tissues and organs far from the glands that make them.

Detailed explanation-4: -In negative feedback systems, a stimulus elicits the release of a substance; once the substance reaches a certain level, it sends a signal that stops further release of the substance. In this way, the concentration of hormones in blood is maintained within a narrow range.