autonomic nervous system Flashcards
ratio of pre to post ganglionic fibers for sympathetic nervous system?
1:10
ratio of pre to post ganglionic fibers in parasympathetic?
1:3
what do preganglionic autonomic terminals release?
Ach mediated by nicotonic Ach receptors
what do postganglionic sympathetic terminals release?
norepinephrine (noadrenaline) mediated by five types of noradregergic receptors found in different target sites and having different functions
what do postganglionic parasympathetic terminals release?
Ach by three types of muscarinic receptors found in different target sites and performing different functions
preganglionic fibers cell bodies location?
clustered in nucelus in CNS
postganglionic fibers cell bodies location?
clustered in ganglion outside of CNS
what does ANS innervate?
sympathetic and parasympathetic innervate cardiac muscle, smooth muscle of blood vessels, and glandular tissue and mediate number of visceral reflexes
where are preganglionic sympathetic cells located?
intermediolateral gray of T1-L2
what are the preganglionic parasympathetic cells in the brainstem?
edinger-westphal nucleus of CN III
superior salivatory nucleus of CN VII
inferior salivatory nucleus of CN IX
dorsal motor nucleus of CN X
where are preganglionic parasympathetic cells found?
CN III, CN IX, CN VII, CN X and in intermediolateral gray of S2,3,4
what does sympathetic nervous system innervate?
blood vessels, sweat glands, arrector pili muscles of body wall and limbs
gray rami communicantes?
postganglionic fibers from sympathetic chain ganglia in supply of body wall and limbs.
postganglionic fibers of sympathetic supply of body wall and limbs have what while their targets have what?
aceytlcholine, muscarinic receptors
lesion of superior cervical ganglion in sympathetic supply of head and thoracic viserca?
causes Horner’s syndrome resulting in ptosis, meiosis, anhidrosis, and enophthalmos
