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List two differences between A-band and ...

List two differences between A-band and I-band.

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**Step-by-Step Solution:** 1. **Definition of A-band and I-band:** - The A-band is a dark band in muscle fibers that contains thick filaments (myosin) and is wider than the I-band. - The I-band is a light band that contains thin filaments (actin) and is located on either side of the A-band. 2. **Composition:** - The A-band is composed of both thick (myosin) and thin (actin) filaments, which contribute to its darker appearance. ...
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