The Point of Contact Between the Nerve and the Muscle

Question

The point of contact between the nerve and the muscle fibers it stimulates is called a
A) motor unit
B) neuromuscular junction
C) motor neuron
D) neurotransmitter

Accepted Answer

The point of contact between the nerve and the muscle fibers it stimulates is known as the neuromuscular junction. This is where the nerve releases a neurotransmitter called acetylcholine that binds to receptors on the muscle fibers, causing them to contract. The motor unit refers to a single motor neuron and all the muscle fibers it branches out to control. The motor neuron is the nerve cell that sends signals to the muscle fibers, and the neurotransmitter is the chemical substance released by the nerve that transmits the signal across the junction.