Sliding filament theory can be best explained as:
when myofilaments slide past each other, actin filaments shorten while myosin filament does not shorten
actin and myosin filaments shorten and slide past each other
actin and myosin filaments do not shorten but rather slide pass each other
when myofilaments slide past each other, myosin filaments shorten while actin filaments do not shorten
The sliding filament theory states that contraction of a muscle fibre takes place by the sliding of the thin filaments (actin) over the thick filaments (myosin). During this process, the actin filaments are pulled towards the centre of the 'A' band, causing the sarcomere to shorten. However, the individual lengths of the actin and myosin filaments do not change; only the degree of overlap increases , , .
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