What is the best description of a tetanic contraction in a skeletal muscle cell?
A)A single action potential in the motor neuron causes a sustained contraction.
B)Multiple action potentials in the motor neuron cause a sustained contraction.
C)The action potential in the muscle cell is prolonged to last as long as the contraction.
D)Repeated action potentials from the motor neuron summate into a sustained depolarization of the motor end plate,causing a sustained contraction.
E)A very large amplitude action potential in the motor neuron causes a very strong contraction in the skeletal muscle cell.

Question

Quizplus · Accepted Answer

In a tetanic contraction, multiple action potentials in the motor neuron cause a sustained contraction. This occurs because the frequency of action potentials causes the muscle cell to not fully relax before the next contraction, resulting in a more sustained contraction.

What Is the Best Description of a Tetanic Contraction in a Skeletal