Human Biology

The check offuitary gland and the hypothalamus be found within the master(prenominal) and act together as a unit to drive the performance of most of the other ductless gland glands. The hypothalamus is sometimes referred to as the control centre as it controls pituitary function and plays a vital role co-ordinating between tissue and organ exercise via the secretion of endocrines. The pituitary gland, or master gland, is attached to the hypothalamus by a stalk and is positioned below it in the hypophyseal pit of the sphenoid bone. A pituitary gland is a pea plant size object consisting of three distinct parts, the anterior pituitary or prior lobe, the nerohypophysis or posterior lobe and an intermediate lobe, (Ross and Wilson.1999). Functions of the intermediate lobe atomic number 18 poorly understood and hormones can only be espy in this section during fetal life and in pregnancy. some(prenominal) of the six hormones secreted by the adenohypophysis, (anterior pitui tary lobe), stimulate or concord in secretion by other target endocrine glands go others have a direct effect on specialized tissues. When the hypothalamus detects a change of hormone level in the short letter it produces a hormone, which in turn stimulates the anterior pituitary lobe to go off more of its own chemical messenger. The whole system is correct and controlled by this negative feedback mechanism.

The hormones synthesised by the adenohypophysis include addition hormone, (GH), thyroid stimulating hormone, (TSH), stimulative hormone, (ACTH), prolactin, (PRL), and gonadotrophic hormones, (FSH and LH) . Growth hormone or GH promotes the additio! n of colligation tissues, muscles, the skeleton, and organs such as the pancreas, liver, and kidneys. The production of GH by the adenohypophysis is dependent on the hypothalamus and whether it synthesises growth hormone releasing hormone, (GHRH) or growth hormone rid inhibiting hormone, (GHRIH). GHRIH inhibits the secretion of GH, TSH, ACTH, gastric juice and emptying... If you want to get a full essay, order it on our website: BestEssayCheap.com

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