¤ Explain the mechanism or Muscles Contraction .
OR
¤ Explain the Sliding Filament Theory in Briefly.
[▪▪ Writes all the steps to explain above Topics with give a diagram.]
••• Class 11th.
☞ Asked By ☆ Ⓜr. Thakur ☆
MrThakur14Dec2002:
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Answered by
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Answered by
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Hey mate ^_^
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Answer:
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=> It is the process of muscle contraction during which the thin filaments slide over the thick filaments, which shortens the myofibril.
=> Each muscle fibre has an alternate light and dark band, which contains a special contractile protein, called actin and myosin respectively.
=> Actin is a thin contractile protein present in the light band and is known as the I-band.
=> Whereas myosin is a thick contractile protein present in the dark band and is known as the A-band.
=> There is an elastic fibre called z line that bisects each I-band.
=> The thin filament is firmly anchored to the z line.
=> The central part of the thick filament that is not overlapped by the thin filament is known as the H-zone.
=> During muscle contraction, the myosin heads or cross bridges come in close contact with the thin filaments.
=> The thin filaments are pulled towards the middle of the sarcomere.
=> The Z line attached to the actin filaments is also pulled leading to the shortening of the sarcomere.
=> The length of the band remains constant as its original length.
=> And the I-band shortens and the H-zone disappears.
#Be Brainly❤️
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Answer:
=======
=> It is the process of muscle contraction during which the thin filaments slide over the thick filaments, which shortens the myofibril.
=> Each muscle fibre has an alternate light and dark band, which contains a special contractile protein, called actin and myosin respectively.
=> Actin is a thin contractile protein present in the light band and is known as the I-band.
=> Whereas myosin is a thick contractile protein present in the dark band and is known as the A-band.
=> There is an elastic fibre called z line that bisects each I-band.
=> The thin filament is firmly anchored to the z line.
=> The central part of the thick filament that is not overlapped by the thin filament is known as the H-zone.
=> During muscle contraction, the myosin heads or cross bridges come in close contact with the thin filaments.
=> The thin filaments are pulled towards the middle of the sarcomere.
=> The Z line attached to the actin filaments is also pulled leading to the shortening of the sarcomere.
=> The length of the band remains constant as its original length.
=> And the I-band shortens and the H-zone disappears.
#Be Brainly❤️
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