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ANS fibers (Adernergic fibers (Two types (beta (B1 (excitatory), B2…
ANS fibers
Adernergic fibers
most sympathetic postganglionic fibers
Release NE
Two types
alpha
a2
inhibitory
a1
excitatory
beta
B1
excitatory
B2
inhibitory
B3
Cholernergic fibers
preganglionic axons and parasympathetic postganglionic axons
release ACh
2 types
Nicotinic receptors
ACh binding is always stimualtory
Muscarinic receptors
can be inhibitory or exhitatory depending on subclass