Increasing the frequency of stimulation so that a muscle contracts without relaxation is called

A) tetany

B) a twitch.

C) relaxation.

D) recovery

E) recruitment.

Tetany.

Explanation:

Tetany is also known as tetanic seizure. This medical condition arises due to the increase in the frequency of the action potential of the muscle cells or the nerves that innervates in the muscle cell.

The tetany causes the increase in the frequency of stimulation that increases the muscle contraction but the relaxation of muscle does not occur. Tingling around or near the mouth can be felt in tetany.

Thus, the correct answer is option (A).