Question

Tetanus of muscles is described as Select one: a. action potential frequency is high enough that no relaxation of muscle fibers occurs. b. a muscle produces constant tension during contraction. c. a muscle produces an increasing tension during contraction. d. a muscle produces increasing tension as it shortens. e. a muscle produces tension, but the length of the muscle is increasing.

Answer 1

Answer: a. action potential frequency is high enough that no relaxation of muscle fibers occurs.

Explanation:

A tetanic contraction occurs due to repeated stimuli at short intervals. In this situation, the muscle fiber does nor relax and contracts again. It is a process of sustained contraction of muscles, which evoke when the motor nerve innervates a skeletal muscle and emits the action potential at high rate. The muscles become hyperactive in this condition.