1. Tardigrade
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  3. Biology
  4. Assertion: Mechanism of muscle contraction is explained by sliding-filament theory. Reason: Contraction of muscle fibre takes place by the sliding of thick filaments over the thin filaments.

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Q. Assertion : Mechanism of muscle contraction is explained by sliding-filament theory.
Reason : Contraction of muscle fibre takes place by the sliding of thick filaments over the thin filaments.

Locomotion and Movement

Solution:

Mechanism of muscle contraction is best explained by the sliding filament theory which states that contraction of a muscle fibre takes place by the sliding of the thin filaments over the thick filaments.