Sliding filament theory can be best explained as:

Sliding filament theory can be best explained as:

Options

(a) Actin and Myosin filaments shorten and slidepass each other
(b) Actin and Myosin filaments do not shorten but rather slide pass each other
(c) When myofilaments slide pass each other, Myosin filaments shorten while Actin filaments do not shorten
(d) When myofilaments slide pass each other Actin filaments shorten while Myosin filament do not shorten

Correct Answer:

Actin and Myosin filaments do not shorten but rather slide pass each other

Explanation:

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  • The sliding filament theory gives the best
    explanation for the mechanism of muscle
    contraction. It states that contraction of a muscle
    fibre takes place by the sliding of the thin filaments
    over the thick filaments. This was proposed by
    Hugh Huxley and Lean Hanson in 1954. According
    to the theory, during a muscle contraction, thin
    myofilaments show sliding towards H-zone,
    shortening the sacromere, and the cross bridge of
    thick myofilaments connect with portions of thin
    myofilaments and move on the surface of the thin
    myofilaments. This results in the sliding of thin and
    thick myofilaments over each other. However, the
    length of the actin filaments do not change.

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