The principle you're referring to is known as the "All or None" principle. This principle states that a muscle fiber, once triggered, will contract fully or not at all. Here are the steps of how it works:

1. A stimulus from a motor neuron triggers the muscle fiber.
2. This stimulus must reach a certain threshold to initiate the contraction. If the stimulus does not reach this threshold, the muscle fiber will not contract.
3. If the stimulus does reach the threshold, the muscle fiber will contract completely. This is the "all" part of the "all or none" principle.
4. Once the muscle fiber has contracted, it must then relax before it can be stimulated again. This is the "none" part of the "all or none" principle.

Question

The principle you're referring to is known as the "All or None" principle. This principle states that a muscle fiber, once triggered, will contract fully or not at all. Here are the steps of how it works:

1. A stimulus from a motor neuron triggers the muscle fiber.
2. This stimulus must reach a certain threshold to initiate the contraction. If the stimulus does not reach this threshold, the muscle fiber will not contract.
3. If the stimulus does reach the threshold, the muscle fiber will contract completely. This is the "all" part of the "all or none" principle.
4. Once the muscle fiber has contracted, it must then relax before it can be stimulated again. This is the "none" part of the "all or none" principle.

Knowee AI · Accepted Answer

The principle you're referring to is known as the "All or None" principle. This principle states that a muscle fiber, once triggered, will contract fully or not at all. Here are the steps of how it works:

1. A stimulus from a motor neuron triggers the muscle fiber.
2. This stimulus must reach a certain threshold to initiate the contraction. If the stimulus does not reach this threshold, the muscle fiber will not contract.
3. If the stimulus does reach the threshold, the muscle fiber will contract completely. This is the "all" part of the "all or none" principle.
4. Once the muscle fiber has contracted, it must then relax before it can be stimulated again. This is the "none" part of the "all or none" principle.

A muscle fiber will contract completely or not at all. This is known as the or principle.

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