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Endocrine ccc pn105

Endocrine System exam

function on system communication, control, hormone secretion
all organs are glands.... but not all glands are organs
glands secrete hormones into the blood
hormones regulate metabolism, reproduction, growth, and development
hormones helps maintain homeostatis by acid/base balance, fluid/electrolyte balance, energy balance
non-steroid hormones bind to target cell membrane
steroid hormones bind to target cell nucleus
target cells cells acted on by hormones
prostoglandins tissue hormones
tissue hormones powerful substances produced and diffused short distances
prostoglandins influce body functions inflammation, respiration, blood pressure, GI secretions, reproductiion
pituitary gland anterior and posterior
anterior pituitary gland adenohypophysis
posterior pituitary gland neurohypophysis
anterior pituitary controls TSH, ACTH, FSH, LH, GH, prolactin
posterior pituitary controls ADH, oxytocin
pituitary glands are located sellatrucica (Turkish Saddle) in cranial depressions of sphenoidal bone
hypothalamus ADH and oxytocin production occurs here
thyroid gland produces thyroid hormones
thyroid gland located in neck
thyroid hormones t4, t3, calcitonin
t4 thyroxine,most abundant
t3 principal hormone in thyroid
t4 and t3 are responsible for body metabolic rate
calcitonin decreases blood calcium by inhibiting breakdown of bone
for t4 to be produced, diet must contain iodine
parathyroid gland secretes PTH
parathyroid hormone increases blood calcium by increasing bone breakdown
patathyroid hormone located 4 glands, on back
adrenal glands adrenal cortex, adrenal medulla
adrenal glands located over kidneys, 2 separate glands
inner adrenal gland adrenal medulla
outer adrenal gland adrenal cortex
pancreatic islets (islets of langerhans) small, microscopic clusters of cells that secrete glucagon and insulin
glucagon increases blood glucose level
insulin decreases blood glucose level
female sex glands ovaries
parts of ovary ovarian follicle, corpus luteum
feminizing hormones cause breasts, external genitals, body contours, menstrual cycle
male sex glands testes interstitial cells
masculizing hormones cause external genitals, facial hair, voice changes, body contour/muscles
thymus produces thymosin, function of immune system
placenta gonadotrpoins, estrogens, and progesterone hormones
pineal gland small gland, neard 3rd ventricle of brain
this gland predominates children and young adults, grous fibrous and calcified with age pineal gland
third eye (pineal gland) influences secretory activity related to light entering eyes
pineal gland hormones secrete melatonin to regulate internal clock and ovarian activity
Created by: cmp12345