Chapter 75 - Guyton Flashcards
Adenohypophysis
anterior pituitary
Neurohypophysis
posterior pituitary
Adenohypophyseal hormones
ACTH, TSH, FSH, LH, PRL, GH
Tells the pituitary to make hormones!
hypothalamus
TSH
stimulates production of thyroid hormones
GH
stimulates postnatal body growth, secretion of IGF-1, stimulates triglyceride lipolysis, inhibits action of insulin on carbohydrate and lipid metabolism
LH
causes ovulation and formation of corpus luteum in the ovary, stimulates production of estrogen and progesterone in ovary, stimulates testosterone production in testis
PRL
stimulates lactation
FSH
stimulates development of ovarian follicles, regulates spermatogenesis in testis
ACTH
stimulates production of glucocorticoids and androgens by the adrenal cortex, maintains size of zona fasciculata and zona reticularis of cortex
Hypophysiotropic hormones
TRH, GnRH, CRH, GHRH, somatostatin, PIH
Two areas that the anterior pituitary hormones can be regulated.
hypothalamus and anterior pituitary
Biological actions of GH.
decrease adiposity, increase LBM, increase protein synthesis, increase organ function, increase chondrocyte function (bone health)
Most important factor determining GH secretion.
age
Metabolic effects of GH.
increase plasma glucose, free fatty acids, ketoacids, and decrease plasma amino acids