Nicotinic receptors are found at neuroeffector junctions of the parasympathetic nervous system. Respond to epinephrine. **open chemically-gated sodium ion channels. Respond to norepinephrine. Are found at neuroeffector junctions of the sympathetic nervous system.
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The adnergic system and agnoderic agnostics Norepinephrine is the neuro tramsmitter at most Sympatheic Neuro effrctor junctions. Norepinephrine is stored in synaptic vesicles in the cytoplasm of axon terminals, is realeased is respond to nerve impulses, and diffuses across the junction to the effector organ.
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