2. Types of Neurotransmitters: Acetylcholine

Common throughout the nervous system, acetylcholine was first discovered by Henry Hallet Dale in 1914. It is considered an excitatory neurotransmitter because it stimulates the muscles by transmitting messages from motor neurons to skeletal muscles, telling them to execute actions such as moving a leg. In the brain, however, it's considered a neuromodulator because it plays a role in attention, arousal, and even sleep.

types of Neurotransmitters

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