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

question 24

Multiple Choice

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.

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