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Assertion : During muscle contraction I-...

Assertion` :` During muscle contraction I-band and A-band get reduced.
Reason `:-` During contraction thin filament slides over myosin filament.

A

If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion .

B

If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion

C

If Assertion is True but the Reason is False.

D

If both Assertion & Reason are false.

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Knowledge Check

  • During muscle contraction in humans the

    A
    Actin filaments shorten
    B
    Sacromere does not shorten
    C
    A band remain same
    D
    A, H and I bands shorten

  • During muscle contraction, actin and myosin ffrom

    A
    actomyosin
    B
    actoplasm
    C
    plastosine
    D
    myoplasm.

  • During contraction of muscles :-

    A
    Thin filaments slides over the thick filaments
    B
    Thick filament slides over the thin filaments
    C
    Both filaments slide over each other.
    D
    No filament slides during contraction

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    During muscle contraction, energy is provided by :-

    During muscle contraction, cross bridge is formed between :-

    Assertion : In muscle contraction, length of both A-bands and I-bands decrease. Reason : Both myosin of A-band and actin of I-bands are contractile proteins and decrease in size during muscle contraction.

    Assertion :- When the muscle fibre contracts, sacromere length is reduced. Reason :- Sliding of myosin filament occurs due to rotational movement of myosin head.

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