There is a feedback loop that helps keep the right amount of hormone in the body. The brain, specifically the hypothalamus and the pituitary gland, controls the production of hormones by the adrenal glands. When the hormone reaches its target cell, it joins with the receptor and transmits chemical instructions to the inside of the cell.Īlthough this video the captions in this video are in German, you can see the process. The hormones and receptors on the cell fit like a key and lock. Target cells have receptors that are specific to each hormone. Hormones secreted from glands of the endocrine system travel in the bloodstream to target cells. The adrenal glands-which are also called suprarenal glands-are part of the endocrine system and are found on the top of each kidney.
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