ANS Flashcards
1
Q
does ANS integrate/receive input from CNS?
A
- receives some input from limbic system and other region of cerebrum
- regulated by hypothalamus and brain stem
2
Q
excitatory effects of somatic motor neurons
A
somatic motor neurons ALWAYS have excitatory effect on muscle fibres
- inhibition req inhibition of motor neuron itself
3
Q
ratio of motor neurons in somatic and ANS
A
somatic → single MN
ANS → 2 MN in series (pre and post ganglionic)
4
Q
ACh
A
- ALWAYS excitatory in somatic
- excite/inhibitory in ANS
5
Q
cholinergicR
A
nicR or musR
- ligand gated → quick depol
6
Q
rocuronium
A
nicR blocker
7
Q
musR
A
PNS AND sweat glands of SNS
8
Q
ipratropium
A
musR blocker
9
Q
musR targets
A
m1 → neural (CNS) excitatory
m2 → cardiac → inhib
m3 → glandular/SM → ex
10
Q
a1
A
on BV → constricts
11
Q
prazosin
A
a1 antagonist
12
Q
a2
A
inhibit response (-ve FB on a1 presynaptic → decrease NA release)
13
Q
b1
A
mainly in heart (but also kidneys) → ex
14
Q
atenolol
A
b1 antagonist
15
Q
b2
A
dilation of bronchial SM
