Question

The axon terminal of a motor neuron "connects" with the muscle fiber at a place called __________ neuromuscular junction. (in general, a motor neuron and the muscle fibers under its control are called a __________ motor unit)

a) Synapse, neural
b) Myelin, skeletal
c) Gap, muscle
d) Terminal, coordinated
e) Junction, control

Answer 1

The connection between the motor neuron and the muscle fiber occurs at the neuromuscular junction. A motor neuron and the muscle fibers it controls are collectively referred to as a motor unit.

Step-by-step explanation:

The axon terminal of a motor neuron connects with the muscle fiber at a place called the neuromuscular junction. In general, a motor neuron and the muscle fibers under its control are called a motor unit.

The neuromuscular junction is a specialized synaptic structure where the synaptic end bulbs of motor neurons release acetylcholine, which binds to receptors on the muscle fiber sarcolemma. This triggers the muscle fiber to contract. Each muscle fiber is innervated by only one motor neuron, and the group of fibers that a single neuron innervates is known as a motor unit. The size and strength of a motor unit can vary, affecting muscle function and control.