MICROANATOMY

Detailed explanation-1: -The anterior pituitary in turn releases hormones that regulate hormone production by other endocrine glands. The anterior pituitary releases the thyroid-stimulating hormone, which then stimulates the thyroid gland to produce the hormones T3 and T4.

Detailed explanation-2: -An example of the fact that some hormones control the release of other hormones is the hypothalamus à pituitary à thyroid chain. The hypothalamus signals the pituitary to release TSH (thyroid-stimulating hormone), which causes the thyroid to release thyroxin.

Detailed explanation-3: -Tropic hormones indirectly affect target cells by first stimulating other endocrine glands. Corticotropin-releasing hormone (CRH) is released from the hypothalamus, which stimulates the anterior pituitary to release adrenocorticotropic hormone (ACTH). ACTH then acts on its target organ, the adrenal cortex.