If a stimulus, several times greater than the threshold stimulus, is provided to a musclw fibre, it will

Options

A. contract with a larger force
B. contract wit a smaller force
C. contract with the same force
D. undergo tetany.

Explanation

### Step-by-Step Solution:

1. **Understanding Muscle Fiber Response**: Muscle fibers are specialized tissues that respond to stimuli. They require a neural signal from the central nervous system (CNS) to initiate contraction.

2. **Threshold Stimulus Definition**: The threshold stimulus is the minimum level of stimulus required to generate an action potential in the muscle fiber. This action potential is necessary for muscle contraction to occur.

3. **Action Potential Generation**: When a stimulus reaches the threshold level, it generates an action potential in the muscle fiber. This action potential leads to the contraction of the muscle.

4. **Effect of Increased Stimulus**: If a stimulus is provided that is several times greater than the threshold stimulus, the muscle fiber will still contract. However, the force of contraction will not increase beyond what is produced by the threshold stimulus.

5. **Conclusion**: Therefore, regardless of whether the stimulus is just at the threshold level or significantly greater, the muscle will contract with the same force once the threshold is met. This characteristic is known as the "all-or-nothing" principle of muscle contraction.

### Final Answer:
If a stimulus, several times greater than the threshold stimulus, is provided to a muscle fiber, it will contract with the same force as if it were stimulated by a threshold stimulus.

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