endocrine system Flashcards
what are exocrine glands
secrete their products of the ducts
what does the pineal gland secret and do
melatonin, regulates circadian and seasonal rhythm
endocrine gland vs organ
gland is made of glandular tissue and only produced hormones required whereas organ is not purely required to produce hormones Eg pancrease=endocrine function aswell as others
function of the posterior pituitary gland
stores and releases hormones from the hypothalamus
hypophyseal portal veins
directly delivers hormones to the bloodstream
what does the hypothalamus do
regulates pituitary glands function/release of hormones in posterior pituitary gland
what is the function of follicular cells
regulate cell and tissue metabolism, heat production and body growth
function of para-follicular cells and what it is regulated by
secrete calcitonin to lower blood calcium levels
regulated by blood calcium levels
cells within the parathyroid glands and function
chief cells- increase blood Ca and Mg and reduce phosphate
oxyphil cells- no functions
different zones of the adrenal cortex
zona glomerulosa(outer)
zona fasciculata (middle)
zona reticularis (inner)
function of the Zona glomerulosa
regulation of sodium and potassium, homeostasis and water balance
zona fasciculata
regulates cortisol
zona reticularis
control androgens
adrenal medulla function
produce epinephrine and norepinephrine
which initiate the sympathetic fight or flight response
cells produced by the pancrease and hormone
alpha cells- produce glucagon
beta cells-produce insulin
delta cells- produce somatostatin=inhibits insulin and glucagon
f cells- prodce pancreatic polypeptides
