Pituitary, posterior
The back portion of the pituitary, a small gland in the head called the master gland. The posterior pituitary secretes the hormone oxytocin which increases uterine contractions and antidiuretic hormone (ADH) which increases reabsorption of water by the tubules of the kidney. Underproduction of ADH results in a disorder called diabetes insipidus characterized by inability to concentrate the urine and, consequently, excess urination leading potentially to dehydration. The urine is "insipid" (overly dilute).

Medical dictionary. 2011.

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  • Posterior pituitary — Pituitary gland. Posterior pituitary is in blue. Pars nervosa and infundibular stalk are not labeled, but pars nervosa is at bottom and infundibular stalk is at top.) …   Wikipedia

  • pituitary body — noun the master gland of the endocrine system; located at the base of the brain • Syn: ↑pituitary, ↑pituitary gland, ↑hypophysis • Derivationally related forms: ↑hypophysial (for: ↑hypophysis), ↑ …   Useful english dictionary

  • pituitary gland — noun the master gland of the endocrine system; located at the base of the brain (Freq. 2) • Syn: ↑pituitary, ↑pituitary body, ↑hypophysis • Derivationally related forms: ↑hypophysial (for: ↑ …   Useful english dictionary

  • pituitary gland — pitu′itary gland n. anat. a small, somewhat cherry shaped double lobed structure attached to the base of the brain, constituting the master endocrine gland affecting all hormonal functions of the body Compare anterior pituitary posterior… …   From formal English to slang

  • posterior lobe of hypophysis — posterior pituitary lobe, posterior lobe of pituitary gland neurohypophysis …   Medical dictionary

  • posterior pituitary gland — n NEUROHYPOPHYSIS …   Medical dictionary

  • pituitary gland — or pituitary body n. a small, oval endocrine gland attached by a stalk to the base of the brain and consisting of an anterior and a posterior lobe: it secretes hormones influencing body growth, metabolism, the activity of other endocrine glands,… …   English World dictionary

  • pituitary gland — Anat. a small, somewhat cherry shaped double structure attached by a stalk to the base of the brain and constituting the master endocrine gland affecting all hormonal functions in the body, consisting of an anterior region (anterior pituitary or… …   Universalium

  • Pituitary gland — Infobox Anatomy Name = PAGENAME Latin = hypophysis, glandula pituitaria GraySubject = 275 GrayPage = 1275 Caption = Located at the base of the brain, the pituitary gland is protected by a bony structure called the sella turcica(also known as… …   Wikipedia

  • Pituitary gland — The main endocrine gland. It is a small structure in the head. It is called the master gland because it produces hormones that control other glands and many body functions including growth. The pituitary consists of the anterior and posterior… …   Medical dictionary

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