Acetylcholine

Often called the "chief" neurotransmitter of the parasympathetic nervous system, it helps control involuntary processes, including slowing the heart rate, decreasing blood pressure, stimulating digestion, and increasing secretions.

It plays a central role in learning, memory, arousal, and attention. acetylcholine

Acetylcholine is synthesized within nerve terminals from two primary components: choline (often derived from diet) and acetyl coenzyme A. An enzyme called facilitates this process. Acetylcholine (ACh): What It Is, Function & Deficiency it helps control involuntary processes