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Assertion (A): Muscle fibers are classified as red and white fibers based on the amount of myoglobin present in them.
Reason (R): Red fibers contain more myoglobin, which enhances their ability to store oxygen and sustain aerobic metabolism.
  • 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 'B'. Can you explain this answer?
Most Upvoted Answer
Assertion (A): Muscle fibers are classified as red and white fibers ba...
Understanding Muscle Fiber Classification
Muscle fibers are primarily classified based on their biochemical properties, particularly the presence of myoglobin. This classification is crucial in understanding muscle function and performance.
Assertion (A) Explained
- Muscle fibers are indeed classified as red and white fibers.
- The classification is based on the amount of myoglobin present in them.
Reason (R) Explained
- Red fibers, also known as slow-twitch fibers, contain a higher amount of myoglobin.
- This increased myoglobin allows red fibers to store more oxygen, which is essential for aerobic metabolism.
- Aerobic metabolism is important for endurance activities, as it provides energy over extended durations.
Correctness of Assertion and Reason
- Both Assertion (A) and Reason (R) are true.
- However, while Reason (R) provides a valid explanation for the classification, it does not encompass all aspects of muscle fiber classification. Other factors like fiber type, contraction speed, and fatigue resistance also play roles in differentiating red and white fibers.
Conclusion
- Hence, while both statements are true, the reason does not fully explain the assertion since the classification of muscle fibers is based on multiple criteria.
- Therefore, the correct answer is option 'B': both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
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Community Answer
Assertion (A): Muscle fibers are classified as red and white fibers ba...
 
- Assertion (A) is true: Muscle fibers are indeed classified into red and white fibers based on myoglobin content.
- Reason (R) is also true: Red fibers do contain more myoglobin, which allows for better oxygen storage and supports aerobic metabolism.
-Reason is just describing about red fibres.If it would have mentioned description of white fibres then the reason would have become the correct explanation of the assertion 
Topic in NCERT: MUSCLE FIBRES
Line in NCERT: "Muscles are classified as Red and White fibres based primarily on the amount of red coloured myoglobin pigment in them."
 
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Assertion (A): Muscle fibers are classified as red and white fibers based on the amount of myoglobin present in them.Reason (R): Red fibers contain more myoglobin, which enhances their ability to store oxygen and sustain aerobic metabolism.a)If both Assertion and Reason are true and Reason is the correct explanation of Assertionb)If both Assertion and Reason are true but Reason is not the correct explanation of Assertionc)If Assertion is true but Reason is falsed)If both Assertion and Reason are falseCorrect answer is option 'B'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Assertion (A): Muscle fibers are classified as red and white fibers based on the amount of myoglobin present in them.Reason (R): Red fibers contain more myoglobin, which enhances their ability to store oxygen and sustain aerobic metabolism.a)If both Assertion and Reason are true and Reason is the correct explanation of Assertionb)If both Assertion and Reason are true but Reason is not the correct explanation of Assertionc)If Assertion is true but Reason is falsed)If both Assertion and Reason are falseCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Assertion (A): Muscle fibers are classified as red and white fibers based on the amount of myoglobin present in them.Reason (R): Red fibers contain more myoglobin, which enhances their ability to store oxygen and sustain aerobic metabolism.a)If both Assertion and Reason are true and Reason is the correct explanation of Assertionb)If both Assertion and Reason are true but Reason is not the correct explanation of Assertionc)If Assertion is true but Reason is falsed)If both Assertion and Reason are falseCorrect answer is option 'B'. Can you explain this answer?.
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