Within an individual motor unit

Question

Accepted Answer

the muscle fibres are all of the same type.

Answer

a graded contraction can be produced as the action potential travelling down the nerve axon excites progressively more muscle fibres.

Answer

the contractile work can be shared by switching different muscle fibres of the motor unit on and off at different times.

Answer

the main thing that will determine the strength of contraction is how many axons within that motor unit are stimulated.

Answer

the only way that the contraction strength can be graded is by changing the length of the muscle fibres.

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