The Rapid Rise and Fall in Force Produced by a Muscle

Question

The rapid rise and fall in force produced by a muscle fiber after a single action potential is a(n)
A) tetanus.
B) unfused tetanus.
C) twitch.
D) motor end plate potential.
E) muscle action potential.

Accepted Answer

The rapid rise and fall in force produced by a muscle fiber after a single action potential is called a twitch. A twitch is a brief and sudden contraction of a muscle fiber in response to a single action potential. It consists of three phases: the latent period, the contraction phase, and the relaxation phase.