or

ask mattrab Visit www.askmattrab.com for more academic resources.

The Hypothalamus

312628 2200 1200x628


Hypothalamus is a small part of the brain found in the ventral part of the diencephalon of the forebrain. It links the nervous system with the endocrine system via the pituitary gland. The hypothalamus releases releasing and non-releasing hormones.

The releasing hormones secreted by the hypothalamus are as follows.

1)Thyrotropin Releasing Hormone(TRH): It stimulates the pituitary gland to release thyrotropin(Thyroid-stimulating hormone).

2)Corticotropin-Releasing Hormone(CRH): It stimulated the pituitary gland to release adrenocorticotropic hormone(ACTH).

3)Growth Hormone Releasing Hormone(GHRH): It stimulates the pituitary gland to release Growth Hormone(GH).

4)Prolactin Releasing Hormone(PRH): It stimulates the pituitary gland to release Prolactin(PRL).

5)Gonadotropin-Releasing Hormone(GnRH): It stimulates the pituitary gland to release gonadotropins:-  Follicle Stimulating Hormone(FSH) and Luteinizing Hormone(LH).

6)Growth Hormone Inhibiting Hormone(GHIH): It inhibits the release of Growth Hormone by the pituitary gland.

7)Prolactin Inhibiting Hormone(PIH): It inhibits the secretion of prolactin by the pituitary gland. 

The non-releasing hormones secreted by the pituitary glands are as follows.

1)Oxytocin: It causes the contraction of the myoepithelium of mammary glands and myometrium of the uterus during childbirth.

2)Vasopressin/Anti-Diuretic Hormone(ADH): It prevents diuresis(excess urination) by stimulating distal convoluted tubule(DCT) and collecting duct(CD).