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GH produced by what?
somatotrophs
what inhibits GH
glucose and mental stress
what increases GH
physical stress and exercise
what happens when you have too much GH?
Giantism: prior to puberty
Acromegaly: after puberty
What happens when you have too little GH?
dwarfism: individuals do not produce GHRH
pygmies: not alot of igf-1 and no GH receptor on liver
what does GH do?
increase in size, cell division, and protein uptake
Hypothalamic control of GH
+ GHRH (somatocrinin)
- GHIH (somatostatin)
Prolactin produced by what?
lactotrophs
what is prolactin responsible for?
initiation of lactation, maintaining lactation
(acts differently in different species)
What inhibits prolactin?
Progesterone inhibits large quantities of prolactin
What is the hypothalamic control on prolactin?