Autonomic Nervous System Flashcards
(35 cards)
What does ANS not innervate?
CNS and Skeletal muscle
purpose of ANS?
homeostasis and survival
Organs are innervated by SNS or PNS?
Both but usually different tissues
Where are the sympathetic ganglion in relation to organs?
more distant
Where are the parasympathetic ganglion in relation to organs?
proximal or within organs
two post-ganglionic types in sympathetic system?
prevertebral
paravertebral (sympathetic chain)
where is the myelination in the pre/post ganglions?
pre: lightly myelinated
post: unmyelinated
Post ganglionic NTs and receptors for SNS and PNS?
SNS: NA or ACh(M);sweat glands
PNS: ACh(M)
primary transmitters in CNS?
Glutamate and GABA
Non classical NTs include?
ATP
NO
neuropeptide P and Y
when more than one NT released it’s called:
co-transmission
Neurotransmission in organs 4 main points:
- no easily visible junction
- multiple NT release sites
- extrajunctional receptors
- unknown functions still
The intermediolateral cell column runs where? for which system?
T1 - L3
SNS preganglionic
what do sympathetic ganglia do?
integration
coordination between sympathetic nerves and organs
Paravertebral post- ganglia does what?
primary vasoconstrictor
prevertebreal post- ganglia does what?
primary non-vascular smooth muscle innervation
which system does convergence vs. divergence?
sympathetic post ganglionic
preganglionic: divergence
prevertebral: convergence
SNS also activates what?
Adrenal glands to get mass adrenoceptor activation via hormones
day-to day sympathetic activation does what?
regulates and tweaks a variety of things like HR, BP, reproduction, tissues/organs
3 cranial preganglionic neurons include:
- edinger-westphal
- salivatory nuclei
- dorsal motor vagus/n.Ambuguous
preganglionic sacral do what?
control pelvic organs via pelvic plexus
what’s special about pelvic plexus?
unusually long axons
vulnerable to surgical injury
mixed ganglia
pelvic ganglia are?
relay stations, no dendrites
Parasympathetic NS works purely via?
synapses
