endocrine system Flashcards
endocrine gland
secretes hormones carried by blood
exocrine gland
secrete hormones into ducts
endocrine glands examples
pituitary
pineal
thyroid
parathyroid
thymus
pancreas
adrenal
ovaries/testes
prostaglandins
local effect over nearby nearby cells
lipid type hormone
where do hormones travel
bloodstream, to nearby cells, other locations in same cell
steroid hormones
fr cholesterol and lipid soluble
transported through blood w carrier protein
can easily diffuse through the cell membrane
can cause changes in dna transcription
come fr: adrenal gland
non steroid hormones
use second messengers to enter cell
come fr: hypothalamus, anterior/posterior pitutiary, parathyroid, adrenal, thyroid, pancreas
how are hormones regulated
negative feedback
growth hormone
somatotropin
regulate body growth, protein synthesis, cellular rep
oxytocin
fr pituitary gland
stim uterine contractions and milk to boobs
antidiuretic
fr posterior pit
water reabsorbtion
raises blood pressure
pituitary gland
anterior and posterior
2 step process: hypothalamus release hormone travel to pit, then anterior release hormone
- growth hormone released in response to hypothalamus
what inhibits growth hormone
somatostatin
adrenocorticotropic hormone
fr anterior pituitary
stim release cortisol and aldosterone in adrenal cortex
aldosterone
increase reabsorption of Na by kidneys
help w blood pressure reg
up water retention
fr anterior pit