What neurotransmitter coordinates muscle actions a. acetylcholine b. epinepherine c. endorphin d. serotonin e. GABA?

The correct answer is a. acetylcholine

Acetylcholine is a neurotransmitter that coordinates muscle actions. It is released by motor neurons and binds to receptors on muscle cells, causing them to contract. Acetylcholine is also involved in memory and learning.