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Biology 3201 13.2 Endocrine glands (pituitary) p. 427-431
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Pituitary is connected to Hypothalamus
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Pituitary has 2 lobes
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Control of the Anterior is different from the posterior
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Posterior pituitary stores hormones for release
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Where the pituitary fits in the big picture!!
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Real pituitary
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Portal system or vessels
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Master Gland
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Oxytocin Antidiuretic ACTH TSH HGH LH/FSH Prolactin
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Gigantism 12 year old boy 6’ 5” Too much HGH in youth usually caused by tumour
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Acromegaly enlarged hands, feet & face Too much HGH as adult Usually caused by tumour treat tumor or hGH blocking drugs
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Pituitary dwarfism too little HGH as child tumor or missing pituitary note normal proportions
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Genetic dwarfism note out of proportion big head regular body, short legs & arms
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Prolactin stimulates lactogenesis Normally dopamine inhibits prolactin suckling stimultes nerves on nipple hypothalmus stimultes the production of prolactin Neuroendocrine reflex
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Anti-diuretic hormone produced in Posterior Pituitary causes body to retain water too much salt detected by HYPO ADH produced too little salt detected less ADH produced Diabetes insipidus= insufficient Anti-diuretic produced
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Oxytocin 1 function
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Oxytocin 2nd function
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Oxytocin; Affiliation hormone
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Web sites http://www.umm.edu/endocrin/pitgland.htm http://arbl.cvmbs.colostate.edu/hbooks/pathphys/endocrine/hypopit/ http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/P/Pituitary.html http://www.pituitary.org.uk/disorders/
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