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Assertion: Mechanism of muscle contraction is explained by sliding-filament theory.
Reason: Contraction of muscle fibre takes place by the sliding of thick filaments over the thin filaments
  • a)
    If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
  • b)
    If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
  • c)
    If Assertion is true but Reason is false.
  • d)
    If both Assertion and Reason are false.
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
Assertion: Mechanism of muscle contraction is explained by sliding-fil...
Mechanism of muscle contraction is best explained by the sliding filament theory which states that contraction of a muscle fibre takes place by the sliding of the actin filaments over the thick myosin filaments.
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Community Answer
Assertion: Mechanism of muscle contraction is explained by sliding-fil...
Assertion and Reason Analysis
The assertion states that the mechanism of muscle contraction is explained by the sliding-filament theory. The reason provided indicates that muscle fiber contraction occurs due to the sliding of thick filaments over the thin filaments.
Explanation of the Assertion
- The sliding-filament theory is indeed the widely accepted explanation for how muscles contract.
- It describes the process where actin (thin filaments) and myosin (thick filaments) interact to shorten the muscle fiber, leading to contraction.
Evaluation of the Reason
- The reason accurately describes a key aspect of the sliding-filament theory.
- However, the assertion encompasses a broader understanding of the mechanism, including the role of ATP, calcium ions, and the overall muscle physiology.
Conclusion
- The assertion is true as the sliding-filament theory correctly explains muscle contraction.
- The reason is also true but does not fully capture the entirety of the assertion, making it an incomplete explanation.
Correct Answer Justification
- Therefore, the correct answer is option 'C': "If Assertion is true but Reason is false."
- The reason provided does not fully explain the assertion, despite both being correct statements regarding muscle contraction.
This nuanced understanding helps clarify why option 'C' is the best choice.
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Assertion: Mechanism of muscle contraction is explained by sliding-filament theory.Reason: Contraction of muscle fibre takes place by the sliding of thick filaments over the thin filamentsa)If both Assertion and Reason are true and Reason is the correct explanation of Assertion.b)If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.c)If Assertion is true but Reason is false.d)If both Assertion and Reason are false.Correct answer is option 'C'. Can you explain this answer?
Question Description
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