The light band of the myofibril that contains actin but no myosin is the
Correct answer: C. I band
- A. A band
- B. H zone
- C. I band
- D. Z line
Explanation
The I band holds only thin actin filaments and shortens during contraction, while the A band spans the whole length of the myosin. The Z line bisects each I band and marks the boundary of the sarcomere.
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The human skeleton provides support, protects organs, enables movement with muscles and stores minerals while bone marrow produces blood cells. Questions cover the axial and appendicular skeleton, types of bones and joints, cartilage, ligaments and tendons, and the difference between fixed, slightly movable and freely movable joints.
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