Which of the following defines a motor unit?
A) one actin binding site and its myosin partner
B) one sarcomere and all of its actin and myosin filaments
C) one myofibril and all of its sarcomeres
D) one motor neuron and all of the muscle fibers it controls

Question

Quizplus · Accepted Answer

A motor unit is defined as one motor neuron and all of the muscle fibers it controls. This is crucial for understanding how muscles contract as a whole, with varying numbers of muscle fibers being activated for different types of movements.

Which of the Following Defines a Motor Unit