Biology Endocrine glands (pituitary) p
Pituitary is connected to Hypothalamus
Pituitary has 2 lobes
Control of the Anterior is different from the posterior
Posterior pituitary stores hormones for release
Where the pituitary fits in the big picture!!
Real pituitary
Portal system or vessels
Master Gland
Oxytocin Antidiuretic ACTH TSH HGH LH/FSH Prolactin
Gigantism 12 year old boy 6’ 5” Too much HGH in youth usually caused by tumour
Acromegaly enlarged hands, feet & face Too much HGH as adult Usually caused by tumour treat tumor or hGH blocking drugs
Pituitary dwarfism too little HGH as child tumor or missing pituitary note normal proportions
Genetic dwarfism note out of proportion big head regular body, short legs & arms
Prolactin stimulates lactogenesis Normally dopamine inhibits prolactin suckling stimultes nerves on nipple hypothalmus stimultes the production of prolactin Neuroendocrine reflex
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
Oxytocin 1 function
Oxytocin 2nd function
Oxytocin; Affiliation hormone
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