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Reproductive Hormones Overview - Anatomy & Physiology (view source)
Revision as of 16:57, 22 August 2011
, 16:57, 22 August 2011→Gonadotropin Releasing Hormone (GnRH)
==Reproductive Hormones==
==Reproductive Hormones==
===Gonadotropin Releasing Hormone (GnRH)===
===Gonadotropin Releasing Hormone (GnRH)===
GnRH is a neuropeptide (a decapeptide) that is produced in the '''hypothalamic surge''' and '''tonic''' centres. In the male and the female, the target tissue is the '''anterior pituitary gland''', specifically '''Gonadotroph cells'''. In males and females, secretion of GnRH results in the release of '''Follicle Stimulating Hormone (FSH)''' and '''Leutinising Hormone (LH)''' from the anterior pituitary gland.
GnRH is a neuropeptide (a decapeptide) that is produced in the '''hypothalamic surge''' and '''tonic''' centres. In the male and the female, the target tissue is the '''anterior pituitary gland''', specifically '''Gonadotroph cells'''. In males and females, secretion of GnRH results in the release of '''Follicle Stimulating Hormone (FSH)''' and '''Leutinising Hormone (LH)''' from the anterior pituitary gland.
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GnRH-producing neurons are stimulated into production in response to spontaneous rhythms and by sensory impulses from sensory inputs derived from the external environment. Alterations in the internal conditions of the body can also result in altered GnRH production. For example in some species such as the sheep, there is seasonal sexual activity and the cerebral cortex, hypothalamus, pituitary and testes interact to regulate functions further along the signalling chain.
====GnRH in Males====
In males there are between 4-12 GnRH peaks per day. Plasma concentrations of LH peak approximately 10mins post GnRH surge.
====GnRH in Females====
===Leutinising Hormone===
===Leutinising Hormone===