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Consider the following events w.r.t. contraction of skeletal muscle fibres
a. Shortening of I band
b. Shortening of actin filaments
c. Shortening of myosin filaments
d. Shortening of sarcomere
e. Increase in length of H-zone
Choose the option with only incorrect events.
- a)b, c and e
- b)b, c and d
- c)c, d and e
- d)a, b and c
Correct answer is option 'C'. Can you explain this answer?
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Most Upvoted Answer
Consider the following events w.r.t. contraction of skeletal muscle fi...
Events during Contraction of Skeletal Muscle Fibers
• The contraction of skeletal muscle fibers involves a series of events that result in the shortening of sarcomeres, which leads to muscle contraction.
The Correct Events:
• Shortening of I band: During muscle contraction, the I band (the region between the ends of the thick filaments) shortens as the thin filaments move towards the center of the sarcomere.
• Shortening of actin filaments: The actin filaments slide over the myosin filaments towards the center of the sarcomere, causing the thin filaments to shorten.
• Shortening of sarcomere: The sarcomere shortens as the Z-lines move closer together.
• Increase in length of H-zone: The H-zone (the region of the sarcomere where there are only thick filaments) decreases in length during muscle contraction.
The Incorrect Events:
• Shortening of myosin filaments: The myosin filaments do not shorten during muscle contraction. Instead, they remain the same length and move over the actin filaments towards the center of the sarcomere.
• Therefore, option C is the correct answer as it includes the incorrect events of shortening of myosin filaments, shortening of actin filaments, and shortening of I band.
• The contraction of skeletal muscle fibers involves a series of events that result in the shortening of sarcomeres, which leads to muscle contraction.
The Correct Events:
• Shortening of I band: During muscle contraction, the I band (the region between the ends of the thick filaments) shortens as the thin filaments move towards the center of the sarcomere.
• Shortening of actin filaments: The actin filaments slide over the myosin filaments towards the center of the sarcomere, causing the thin filaments to shorten.
• Shortening of sarcomere: The sarcomere shortens as the Z-lines move closer together.
• Increase in length of H-zone: The H-zone (the region of the sarcomere where there are only thick filaments) decreases in length during muscle contraction.
The Incorrect Events:
• Shortening of myosin filaments: The myosin filaments do not shorten during muscle contraction. Instead, they remain the same length and move over the actin filaments towards the center of the sarcomere.
• Therefore, option C is the correct answer as it includes the incorrect events of shortening of myosin filaments, shortening of actin filaments, and shortening of I band.
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Consider the following events w.r.t. contraction of skeletal muscle fi...
During contraction of skeletal muscle fibre the length of sarcomere decreases.
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Consider the following events w.r.t. contraction of skeletal muscle fibresa. Shortening of I bandb. Shortening of actin filamentsc. Shortening of myosin filamentsd. Shortening of sarcomeree. Increase in length of H-zoneChoose the option with only incorrect events.a)b, c and eb)b, c and dc)c, d and ed)a, b and cCorrect answer is option 'C'. Can you explain this answer?
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Consider the following events w.r.t. contraction of skeletal muscle fibresa. Shortening of I bandb. Shortening of actin filamentsc. Shortening of myosin filamentsd. Shortening of sarcomeree. Increase in length of H-zoneChoose the option with only incorrect events.a)b, c and eb)b, c and dc)c, d and ed)a, b and cCorrect answer is option 'C'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Consider the following events w.r.t. contraction of skeletal muscle fibresa. Shortening of I bandb. Shortening of actin filamentsc. Shortening of myosin filamentsd. Shortening of sarcomeree. Increase in length of H-zoneChoose the option with only incorrect events.a)b, c and eb)b, c and dc)c, d and ed)a, b and cCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following events w.r.t. contraction of skeletal muscle fibresa. Shortening of I bandb. Shortening of actin filamentsc. Shortening of myosin filamentsd. Shortening of sarcomeree. Increase in length of H-zoneChoose the option with only incorrect events.a)b, c and eb)b, c and dc)c, d and ed)a, b and cCorrect answer is option 'C'. Can you explain this answer?.
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