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Assertion (A): Myasthenia gravis is primarily characterized by the rapid degeneration of skeletal muscle fibers.
Reason (R): Myasthenia gravis affects the neuromuscular junction, leading to fatigue and weakness in skeletal muscles.
  • 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 (A): Myasthenia gravis is primarily characterized by the rap...
  • The Assertion (A) is false because myasthenia gravis does not primarily involve the degeneration of muscle fibers; rather, it is an autoimmune disorder affecting the communication at the neuromuscular junction.
  • The Reason (R) is true as it correctly describes the mechanism of myasthenia gravis, which indeed leads to fatigue and weakness in skeletal muscles due to the disruption at the neuromuscular junction.
  • Therefore, since the Assertion is false and the Reason is true, the correct answer is Option C: If Assertion is true but Reason is false.
Community Answer
Assertion (A): Myasthenia gravis is primarily characterized by the rap...
Understanding Myasthenia Gravis
Myasthenia gravis (MG) is an autoimmune disorder that primarily affects the communication between nerves and muscles.
Assertion (A) Explained
- Assertion (A) claims that myasthenia gravis is characterized by the rapid degeneration of skeletal muscle fibers.
- This statement is false because MG does not cause the degeneration of muscle fibers. Instead, it leads to muscle weakness due to impaired signaling at the neuromuscular junction.
Reason (R) Explained
- Reason (R) states that myasthenia gravis affects the neuromuscular junction, which leads to fatigue and weakness in skeletal muscles.
- This statement is true as MG involves antibodies that block or destroy the receptors for acetylcholine at the neuromuscular junction, leading to muscle fatigue and weakness.
Conclusion
- Since Assertion (A) is false and Reason (R) is true, the correct option is C: "If Assertion is true but Reason is false."
- The reason explains the effects of MG accurately, while the assertion misrepresents the condition.
Key Points to Remember
- Myasthenia gravis does not cause muscle fiber degeneration.
- The primary issue in MG is at the neuromuscular junction, not within the muscle fibers themselves.
- Understanding the distinction between the assertion and reason is critical for grasping the pathology of MG.
This clarity helps in comprehending the nature of myasthenia gravis and its effects on muscle function.
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Assertion (A): Myasthenia gravis is primarily characterized by the rapid degeneration of skeletal muscle fibers. Reason (R): Myasthenia gravis affects the neuromuscular junction, leading to fatigue and weakness in skeletal muscles.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 'C'. Can you explain this answer?
Question Description
Assertion (A): Myasthenia gravis is primarily characterized by the rapid degeneration of skeletal muscle fibers. Reason (R): Myasthenia gravis affects the neuromuscular junction, leading to fatigue and weakness in skeletal muscles.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 'C'. Can you explain this answer? for Class 11 2024 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about Assertion (A): Myasthenia gravis is primarily characterized by the rapid degeneration of skeletal muscle fibers. Reason (R): Myasthenia gravis affects the neuromuscular junction, leading to fatigue and weakness in skeletal muscles.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 'C'. Can you explain this answer? covers all topics & solutions for Class 11 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Assertion (A): Myasthenia gravis is primarily characterized by the rapid degeneration of skeletal muscle fibers. Reason (R): Myasthenia gravis affects the neuromuscular junction, leading to fatigue and weakness in skeletal muscles.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 'C'. Can you explain this answer?.
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