46. What are the hormones
secreted by the adrenal
medulla? What are their
respective functions?

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The medullary portion of adrenals
secretes hormones of catecholamine
group: adrenaline (also as
epinephrine) and noradrenaline (
known as norepinephrine). Besides
hormonal function, adrenaline and
act as neurotransmitters
too. neurons that use them
neurotransmitters are called adrenergic
.

Adrenaline increases the glycogen
into glucose (glycogenolysis)
thus glycemia and the basal
rate of the body.
and noradrenaline are released
situations of danger (fightfight flight
response) and they the
strength and rate the heartbeatand
selectivelymodulate the irrigation
in some tissuesby
and selective vasoconstriction.By
vasodilation increase the blood
supply the brain, the muscles the
heart and by they
reduce the blood to the kidneys,
the and the gastrointestinal tract.
like adrenaline and
noradrenaline promote vasodilation
or vasoconstrictionare vasoactive
substances.