acetylcholine receptors

Acetylcholine receptors are specialized proteins located on the surfaces of certain cells, especially nerves and muscles, that respond to the chemical messenger acetylcholine. When acetylcholine binds to these receptors, it triggers a response in the cell—such as muscle contraction or transmitting a nerve signal. There are two main types: nicotinic receptors, which quickly activate muscle movement, and muscarinic receptors, which influence functions like heart rate and gland activity. These receptors are essential for communication within the nervous system and between nerves and muscles, playing key roles in movement, attention, and other bodily functions.