Stress induces a release of corticotropin-releasing hormone ( CRH ) and vasopressin from the hypothalamus, which activates the release of adrenocorticotropic hormone ( ACTH ) from the anterior pituitary gland.
22.
Following secretion, TRH travels across the median eminence to the anterior pituitary gland via the hypophyseal portal system where it stimulates the release of thyroid-stimulating hormone from cells called thyrotropes.
23.
Glucocorticoids act to inhibit feedback of both the hypothalamus, decreasing corticotropin-releasing hormone [ CRH ], and corticotrophs in the anterior pituitary gland, decreasing the amount of adrenocorticotropic hormone [ ACTH ].
24.
This pathway is part of a closed-loop feedback process : Elevated concentrations of T 3, and T 4 in the blood plasma inhibit the production of TSH in the anterior pituitary gland.
25.
Kisspeptin is a protein that regulates the release of GnRH from the hypothalamus, which in turn regulates the release of LH and to a lesser extent, FSH from the anterior pituitary gland.
26.
The Rathke s pouch, a cavity of ectodermal cells of the oropharynx, forms between the fourth and fifth week of gestation and upon full development, it gives rise to the anterior pituitary gland.
27.
Less common causes include : previous treatment with radioactive iodine, injury to the hypothalamus or the anterior pituitary gland, certain medications, a lack of a functioning thyroid at birth or previous thyroid surgery.
28.
Hormonal output from the thyroid is regulated by thyroid-stimulating hormone ( TSH ) secreted from the anterior pituitary gland, which itself is regulated by thyrotropin-releasing hormone ( TRH ) produced by the hypothalamus.
29.
As concentrations of these hormones decrease, the anterior pituitary gland increases production of TSH, and by these processes, a feedback control system stabilizes the amount of thyroid hormones that are in the bloodstream.
30.
Her paper, published in the journal Endocrinology in 1982, suggested that the hormone might have an effect on the anterior pituitary gland in mammals, which helps to regulate growth and ovulation, among other things.
