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Question

Lack of relaxation between successive stimuli in sustained muscle contraction is known as _______________.


A

Spasm

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B

Fatigue

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C

Tetanus

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D

Tonus

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Solution

The correct option is C

Tetanus


The correct option is C.

Explanation for the correct option:

  1. Tetanus is a disease in which there is a lack of relaxation among successive stimuli in sustained muscle contraction.
  2. Tetanus is an infectious disease caused to the bacterium Clostridium tetani.
  3. This bacterium leads to the secretion of a neurotoxin due to which there is amplification in the muscle contraction that leads to a very painful condition.

Explanation for the incorrect options:

Option A:

Spasms are sudden painful muscular contractions that might be due to over-exercising, stress, or dehydration.

Option B:

Fatigue means a feeling of being overtired with reduced energy.

Option D:

Muscle tonus refers to reduced activity of muscle due to partial muscle contraction.

Final answer: Lack of relaxation between successive stimuli in sustained muscle contraction is known as tetanus.


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