When a muscle contracts, the sarcomere shortens. This is called the sliding filament model because _______________________ pulls ___________________ to shorten the sarcomere.
Added by Xavier R.
Step 1
Step 1: Define the sarcomere — the functional unit of a muscle fiber bounded by Z-discs, containing thin filaments (actin) anchored at the Z-discs and thick filaments (myosin) centered at the M-line. Show more…
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