What neurotransmitter is released at the neuromuscular junction Calcium GABA Acetylcholine Serotonin ATP

The neurotransmitter that is released at the neuromuscular junction is Acetylcholine.

Explanation:

• The neuromuscular junction is the specific site where motor neurons communicate with muscle fibers. When a motor neuron sends a signal, it triggers the release of acetylcholine from vesicles within the neuron.
• Acetylcholine then binds to receptors on the muscle fiber's surface, leading to depolarization and the subsequent muscle contraction.
• This process is crucial for voluntary movement and muscle control. Other options listed, such as GABA and serotonin, are involved in different neural functions but do not play a role at the neuromuscular junction.

In summary, among the options provided, acetylcholine is the neurotransmitter responsible for transmitting signals from nerves to muscles at the neuromuscular junction.