endocrine system
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endocrine system
• made of glands that release hormones • works slower than the nervous system but has effects that last longer
what does the endocrine system control
• growth • development • metabolism • stress • water + electrolyte balance • reproduction • homeostasis
how hormones work
• released into bloodstream • travel to target tissues • bind to specific receptors • produced by endocrine and exocrine glands
endocrine glands
• no ducts • hormones go straight into ur blood
exocrine glands
• have ducts (saliva, sweat, bile)
main endocrine glands
• hypothalamus • pituatary • thyroid • parathyroid • adrenal • gonads • placenta • thymus
gonadotropin RH
tells anterior pituitary release LH and FSH
growth hormone RH
tells anterior pituitary release GH
growth hormone IH (somatostatin)
inhibits groth hormone release
thyrotropin RH
tells anterior pituitary release TSH
prolactin RH
tells anterior pituitary release prolactin
prolactin IH
• dopamine • inhibits prolactin
corticotropin RH
tells anterior pituitary release ACTH ACTH tells adrenal cortex to make cortisol
oxytocin
uterine contractions + milk ejection
ADH
kidneys retain water + constrict blood vessels
releasing hormones (from the hypothalamus)
• TRH • GnRH • GHRH • CRH • PRH
inhibiting hormones
• dopamine (PIH) • somatostatin (GHIH)
pituitary gland
master gland
anterior pituitary hormones (FLATPGM)
• FSH • LH • ACTH • TSH • Prolactin • GH • MSH
FSH
matters ovarian follicles/sperm
LH
ovulation + sex hormone production
ACTH
stimulates adrenal cortex (cortisol)
TSH
stimulates thyroid (T3/T4)
prolactin
milk production