hormonal communication Flashcards
insulin secreted by ……
b cells
glucagon secreted by …..
a cells
endocrine gland
an organ that secretes hormones
hormone definition
a chemical messenger that is transported in the blood
types of hormones
steroid and non-steroid
steroid hormone
.chemistry(nature)
.how affects target cell
.examples
.lipid so lipid soluble
.diffuse csm as it is lipid soluble
bind to receptor in cytoplasm or nucleus
inhibits or promotes transcription of a PARTICULAR gene
.testosterone
oestrogen
glucocorticoids
mineralocorticoids
non-steroid hormone
.chemistry/nature
.how affects target cell
.examples
.hydrophilic for example glycoproteins or polypeptides
.bind to a receptor on csm
activate a 2nd messenger eg. cyclic AMP
A cascade of intracellular reactions activates a transcription factor for a particular gene
.Glucagon
insulin
Adrenaline
2 regions of adrenal glands
cortex and adrenal medulla
cortex hormones
Glucocorticoids
mineralocorticoids
androgens eg testosterone
adrenal medulla hormones
adrenaline
noradrenaline
pancreas as exocrine eg
pancreas as endocrine eg
enzyme production
hormone production
exocrine pancreas produces
amylase
lipase
protease
endocrine pancreas produces
insulin
glucagon
Islets of Langerhans is ………………
it is a ………… cluster of cells usually stained …………… in photographs
endocrine
large
lilac/blue
acini is ……………… gland
it is a …………… cluster of cells stained …………………… in photographs
exocrine
small
dark pink/purple
