ANS Flashcards
3 parts of the ANS
sympathetic
parasympathetic
enteric
all ANS preganglionic fibers are ___
cholinergic
parasympathetic postganglionic fibers are __
cholinergic
sympathetic postganglionic fibers are __
adrenergic
where are sympathetics located
T1-L1/2
intermediate cell column is associated with what
sympathetics
describe vasomotor
shunt to large muscles
describe pilomotor
hair on end
describe sudomotor
wet palms
what’s the difference between intrasegmental and intersegmental
intrasegmental - exit directly to organ
intersegmental - ascend or descend before exit
short sympathetic preganglionic nerves release what NT
acetylcholine
long sympathetic post ganglionic nerves release what NT
epinephrine
norepinephrine
epinephrine uses what receptors
alpha and beta
norepinephrine uses what receptors
alpha only
adrenal glands contain what cells that synthesize catecholamines - where are these catecholamines sent
chromaffin cells
sympathetic post ganglionic fibers
alpha catecholamines do what
beta catecholamines do what
alpha - excite smooth muscle (NE/E)
beta - inhibit smooth muscle (E only)
what cranial nerves contain parasympathetics
3, 7, 9, 10
where are parasympathetics located
craniosacral
which cord segments control the bowel and bladder parasympathetics
S2-4
long preganglionic parasympathetic fibers use what NT
acetylcholine
short postganglionic parasympathetic fibers use what NT
acetylcholine
sympathetics contain __ preganglionic fibers and __ postganglionic fibers
short
long
parasympathetics contain __ preganglionic fibers and __ postganglionic fibers
long
short
when was enteric system discovered
when was it related to the ANS
1889
1920’s
enteric system uses what NT
vaso intestinal peptide (VIP)
what two plexus are involved in enteric system
myenteric and submucousal plexuses
what is hirschsprungs disease
aganglionic - no plexus located in the intestinal wall
