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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.
Serotonin is a neurotransmitter involved in the transmission of nerve impulses. Neurotransmitters are chemical messengers within the brain that allow the communication between nerve cells. Packets of serotonin (vesicles) are released from the end of the presynaptic cell into the synaptic cleft.