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Acetylcholine Receptors
Acetylcholine exerts its effects by binding to specific receptors on the surface of cells. There are two primary types of acetylcholine receptors: nicotinic receptors and muscarinic receptors. These receptors are found in different tissues and cells throughout the body.
Nicotinic Receptors: These receptors are named after nicotine because they are also activated by nicotine. Nicotinic receptors are primarily found at neuromuscular junctions, where they mediate muscle contractions. They also exist in the central nervous system and play a role in cognitive function.
Muscarinic Receptors: These receptors are primarily found in the autonomic nervous system, where they influence heart rate, smooth muscle contraction, and glandular secretions. Muscarinic receptors are also found in the CNS and are involved in cognitive functions.
