Question

multiple-choice question
the collection of muscles fibers activated by
a single neuron is known as a

myofibril

motor unit

rewatch

Explanation:

To solve this, we recall the definitions: A myofibril is a basic rod - like unit of a muscle cell, while a motor unit is defined as the collection of muscle fibers activated by a single neuron. So we compare these definitions with the question's description.

Answer:

B. motor unit (assuming the options are labeled with "myofibril" as one option and "motor unit" as the other, with "motor unit" being the correct one)