Answer:
Acetylocholine
Explanation:
Acetylocholine is a neurotransmitter and a neuromoderator.
It is a chemical that that is released by nerves or neurons and has functions in enabling muscle contraction,activates pain responses and plays an important role in learning and memory processes in the hippocampus.
Alzheimer disease is characterized with loss of memory.
Research suggests that the decline in memory is due to a deficiency in Acetylocholine in an individual's brain
