Motor Units & Movement Review Video

Any voluntary movement starts with a command from the _____.

A motor unit consists of a motor neuron and all the muscle fibers it innervates (contracts).

• True

• False

If there is not enough intensity to create an impulse, the motor unit or muscle will still contract, according to the all-or-nothing principle.

• True

• False

The same amount of motor units will be utilized regardless of exercise intensity.

• True

• False

This video recaps primarily motor neurons, but what is the neurons that receive information/stimuli from the external environment?

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