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All or None Law

Muscle contra...

Question

Muscle contraction is initiated by a signal by the central nervous system via

A

Motor nerve

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B

Sensory nerve

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C

Mixed nerve

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D

All of the above

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Solution

The correct option is A Motor nerve
Most of the muscle actions of the body are voluntary except for the pumping of heart and the reflex action. These muscle receive a signal through the motor nerves , send by the brain or the CNS.
So the correct option is ' Motor nerve '.

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iii) Muscle contraction begins by a signal sent by the peripheral nervous system by a motor neuron.

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