Question

57. Choose the false statement:

A. A muscle composed of many small motor units is capable of much more precise control than a muscle composed of a few large motor units.

B. Even when only very light tension development is intended, all muscle fibers within a muscle work together simultaneously to contribute to total tension development.

C. The “all-or-none” property of muscle fibers relates to the fact that when a skeletal muscle fiber is stimulated an event known as a twitch occurs; if the stimulus is sustained the fiber reaches a state of tetani during which it contracts maximally.

Answer 1

Ans:; option C is wrong statement because

The all-or-none law is a principle that states that the strength of a response of a nerve cell or muscle fiber is not dependent upon the strength of the stimulus. If a stimulus is above a certain threshold, a nerve or muscle fiber will fire.

Option b is a good eg of all or none phenomenon.

Option a is correct staments . The best eg of the given situation is muscle of hand which contain mainy small gr of muscle and muscle of arm which ckntain only 3 big muscle.