What is the relationship between the motor neuron axons and muscle fibers?
A) Each axon innervates only one muscle fiber.
B) The more muscle fibers a single axon innervates, the more precise the movements.
C) The more axons, which innervate a single muscle fiber, the more precise the movements.
D) The fewer muscle fibers a single axon innervates, the more precise the movements.

Question

Quizplus · Accepted Answer

The fewer muscle fibers a single axon innervates, the more precise the movements. This is because if one motor neuron is only responsible for a small number of muscle fibers, it can communicate with and control each individual fiber more accurately. This allows for finer, more precise movements, as seen in muscles involved in tasks such as handwriting or playing an instrument.

What Is the Relationship Between the Motor Neuron Axons and Muscle