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Which type of motor unit can contract for many hours, or even days if necessary?

User Zeroweb
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Final answer:

The type of motor unit that can contract for many hours, or even days if necessary, is the large motor unit.

Step-by-step explanation:

The type of motor unit that can contract for many hours, or even days if necessary, is the large motor unit. A large motor unit is an arrangement where a single motor neuron supplies a large number of muscle fibers in a muscle. These motor units are responsible for simple, gross movements and can sustain contraction for extended periods of time.

User Xeraa
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