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Acetylcholine (ACh) is a common neurotransmitter secreted by a variety of neurons. It binds to two different receptors-Ionotropic (fast) nicotinic receptors and metabotropic (slow) muscarinic receptors.1  role in central nervous system. 2  role in peripheral nervous system. 3  receptors and signaling.4  agonists and antagonists.cetylcholine (ACh) is a common neurotransmitter secreted by a variety of neurons. It binds to two different receptors-Ionotropic (fast) nicotinic receptors and metabotropic (slow) muscarinic receptors.
Norepinephrine (NE) is the primary neurotransmitter for postganglionic sympathetic adrenergic nerve s. It is synthesized inside the nerve axon, stored within vesicles, then released by the nerve when an action potential travels down the nerve. Below are the details for release and synthesis of NE: