chapter 16, Emily review Flashcards
hormones
long distance chemical signals that travel in blood or lymph
2 main classes of hormones:
1) amino acids
2) steroids
2 mechanisms of hormone action:
1) stimulate mitosis
2) induce secretory activity
all water-soluble hormones are ALL _________ EXCEPT:
amino based hormones
-thyroid hormone
lipid-soluble
act on intracellular receptors that directly activate genes
water soluble
bind to receptors through secondary messengers
up regulation
target cells form more receptors
down regulation
target cells lose receptors
permissivness
one hormone cant exert its effects its effects w/out another hormone being present
synergism
more than one hormone produces the same effect on a target cell (enhancing)
antagonism
one or more hormones opposes the action of another hormone (against)
humoral stimuli
fluids (blood) and calcium
neural stimuli
hypothalamus and pineal glands
hormonal stimuli
work together
anterior pituitary hormones are all ________ except _______
proteins, growth hormones
tropic hormones
regulate action of other endocrine glands
- TSH
- ACTH
- FSH
- LH
somatotrophs are cells of _______ that specifically target ______ growth. These cells help produce _______
pituitary
body cells
growth hormone (GH)
alcohol inhibits _______
anti diuretic hormone
ADH is also known as
vasopressin
the parathyroid glands contain _______ cell and ______
oxyphil and chief cells
adrenal medulla
nervous tissue; part of sympathetic nervous system
adrenal cortex
3 layers of grandular tissue that synthesize and secrete corticolsteroids
3 layers of adrenal cortex:
zona glomerulus= mineralcorticocoids
zona fasciculate= glucocorticoids
zona reticularis= sex hormones; gonadocprtcoids, androgens
zona reticularis leads to the production of
androgens
cortisol is the most _______ glucocorticoid
significant
glucogenesis Is the formation of
glucose from fats and proteins
chromaffin cells secrete _____ of epinephrine and _____ norepinephrine
80/20
epinephrine
stimulate metabolic activities, bronchial dilation, blood flow to skeletal muscles and heart.
alpha cells
produce glucogen
beta cells
produce insulin
atrial natriuretic peptide (ANP)
reduces blood pressure
gland associate w? immune response is
thymus
hypersecretion of growth hormone
gigantism (kids), acromegaly (adults)
hyposecretion of GH
dwarfism (pituitary)
hypersecretion of thyroid hormone
graves disease
hyposecretion of TH in adults
myxedema
hyposecretion of TH in kids
cretinism
hyperecretion of glucocorticoids
cushings
hyposecretion of glucocorticoids
addisons