ANS Flashcards
parasymp pre/post ganglionic messengers and receptors
Ach (N) / Ach (M)
symp pre/post ganglionic messengers and receptors. Exceptions
Ach (N) / Nor (alpha&beta); Sweat glands: Ach (N) / Ach (M)
Where do most symp postganglionic cell bodies reside? Exception?
in the symp ganglion. Adrenal medulla doesn’t synapse, directly innervates to make epi and NE
what is the opposite of miosis?
mydriasis
what system prepares the lens for near accomodation?
parasymp
what effect does the parasymp have on ventricular contractile force?
none unless symp tone is high enough
constriction of arterioles is via what system and receptors?
alpha 1 of sympathetic (in most places of the body) and via Beta 2 receptors and circulating EPI in skeletal muscle and liver
How is an erection attained?
parasymp division, sacral spinal cord to pelvic plexus, release of NO
How are sexual secretions attained?
sensory nerves leave at L1, L2 to inferior mesenteric ganglion and hypogastric nerve.
How is Ejaculation reached?
SOMATIC. Pudendal nerve, sk muscle contraction
How is detumescence achieved?
via alpha 1 vasoconstriction
What system controls piloerectors, spleen, salivary?
sympathetic (contraction), Sympathetic (contraction), both (parasymp=more and more watery)
What can be used to treat focal hyperhydrosis (eccrine glands)?
BOTOX (symp cholinergic)
which division of the ANS dominates normally? Exceptions?
Parasymp. Exception is unopposed symp tone of blood vessels
two ways to achieve mydriasis?
stimulate symp or block parasymp
