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  1. Sliding filament theory can be best explained as:
    1. Actin and Myosin filaments shorten and slide pass each other
    2. Actin and Myosin filaments do not shorten but rather slide pass each other
    3. When myofilaments slide pass each other, Myosin filaments shorten while Actin filaments do not shorten
    4. When myofilaments slide pass each other Actin filaments shorten while Myosin filament do not shorten
Correct Option: B

Sliding filament theory was given by Huxley and Huxley (1954). It states that Actin and Myosin filaments do not become short but rather slide pass each other. Because of sliding of actin filaments over myosin the length of I-band will change.


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