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Define sliding filament theory of muscle...

Define sliding filament theory of muscle contraction.

Answer

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During muscle contraction

Go through the following statements During muscle contraction, the width of A-band remains constant while I-band shortens. During muscle contraction, the Ca^(2+) released from the SR bind to the troponin component of thin filament The process of muscle contraction is faster in smooth muscle as they have a well developed sarcoplasmic reticulum. The red muscle fibres have abundant mitochondria, low glycogen and poorly formed sarcoplasmic reticulum.

Knowledge Check

  • According to the sliding filament theory of muscle contraction,

    A
    Actin binds ATP and breaks it apart as actin pulls against myosin.
    B
    Calcium are released from myosin as the filaments slide by.
    C
    The thick and thin filaments do not change length during this process.
    D
    All the correct

  • According to the sliding filament theory of muscle contraction,

    A
    Actin binds ATP and breaks it apart as actin pulls against myosin.
    B
    Calcium are released from myosin as the filaments slide by.
    C
    The thick and thin filaments do not change length during this process.
    D
    All the correct

  • Cardiac muscles contract:

    A
    quickly and they fatigue
    B
    quickly and unfatigued
    C
    slowly and are not fatigued
    D
    slowly and they fatigue

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