ENDOCRINE Flashcards
what are endocrine glands made of
cords or secretory epitheloid cells resting on basement membrane
classes of hormone
- peptides
- steroids
- amino acids
list the three types of control mechanism in hormones
- endocrine
paracrine
autocrine
endocrine control mechanism in hormone
hormone secretion into the bloodstream where it is transported to its target cells
paracrien control in hormone
hormone secretion into CT where they taregt adjacent cells that express specific receptors
autocrine control in hormone
hormone secretion which acts on its secretory cell itself
hormone receptors
cell surface receptors and intracellular receptors
negative feedback or hormone
response diminises original stimulus
positive feedback of hormone
response enhances original stimulus
blood supply of pituitary gland
superior hypophyseal arteries
inferior hypohyseal arteries
what does superior hypohyseal artery supply
pars tuberalis
median eminence
infundibulum
what does inferior hypophyseal arteries supply
pars nervosa
what does the hypothalamo-hypohyseal portal system provides link between
hypothalamus and pituitary gland
list the hormones in pars distalis and their respective targetted organs
thytotrophs - thyroid gland
mammotrophs - mammary gland
gonadotrophs - eggs and sperm
cortiocstroph - growth
somatotrophs - growth
what hormones are produced in neuropophysis
oxytocin and adh
What do parafollicular cells secrete and thyroid glands
calcitonin > metabolises calcium
what does the colloid secrete
thyroglobulin
what do chief cells in parathyroid secrete
PTH = parathyroid hormones
what does PTH regulate
calcium and phosphate levels in the blood
cells in the adrenal medulla
chromaffin cells
ganglion cells
chief cells
oxyphil cells
what hormones are secreted by the three layers of the adrenal corte
zona glomerulosa: aldosterone > kidney
zona fasciulate: cortisol > liver
zona reticularis > androgens > goand and skin
adrenal gland blood supply
superior
middle
inferior
supraarenal arteries
