Question

Muscle A and muscle B are the same size, but muscle A is capable of much finer control than muscle B. Which one of the following is likely to be true of muscle A?

(a) It contains fewer motor units than muscle B.

(b) It has larger sarcomeres than muscle B.

(c) It is controlled by more neurons than muscle B.

(d) It is controlled by fewer neurons than muscle B.

Answer 1

Correct option: (c) It is controlled by more neurons than muscle B.

Explanation:

Fine motor control is accomplished by the presence of smaller, more numerous motor units. Each motor unit requires an individual motor neuron.