noun
- A neurotransmitter in the nervous system that transmits signals between nerve cells and muscles, playing a key role in muscle contraction and memory.
Usage: biochemistry; neuroscience; often abbreviated as ACh
Examples
- Acetylcholine is released at the neuromuscular junction to trigger muscle contraction.
- The drug blocks acetylcholine receptors, preventing nerve signals from reaching muscles.
- Alzheimer's disease involves a decline in acetylcholine levels in the brain.
- Acetylcholine plays an important role in attention and learning.
- When acetylcholine binds to its receptors, it causes changes in the electrical activity of cells.