endocrine cells release their secretion to the blood.
endocrine cells release their secretion to the blood.
where does endocrine cells release their secretion to?
the blood
section::::structure.:anterior.









































the anterior pituitary arises from an invagination of the oral ectoderm and forms rathke's pouch. this contrasts with the posterior pituitary, which originates from neuroectoderm.









































endocrine cells of the anterior pituitary are controlled by regulatory hormones released by parvocellular neurosecretory cells in the hypothalamic capillaries leading to infundibular blood vessels, which in turn lead to a second capillary bed in the anterior pituitary. this vascular relationship constitutes the hypothalamo-hypophyseal portal system. diffusing out of the second capillary bed, the hypothalamic releasing hormones then bind to anterior pituitary endocrine cells, upregulating or downregulating their release of hormones.
pituitary gland
section::::role as signalling mediators for pituitary endocrine cells.









































section::::role as signalling mediators for pituitary endocrine cells.:nitric oxide.









































fs cells are thought to have a role in relaying signals to the hormone secreting endocrine cells of the pituitary gland. nitric oxide (no), is reported to be a key modulator of endocrine cell function and has been shown that fs cells (and some endocrine cells) contain neuronal no synthase, a key no production enzyme which is responsible for the production of no from l-arginine. it is thought that fs cells modulate no production in adjacent endocrine cells via paracrine mechanisms.
folliculostellate cell