A smallest contractile unit of muscle contraction called sarcomere is the area between two:
Correct answer: C. Z- Line
- A. H- zone
- B. M- Line
- C. Z- Line
- D. A band
Explanation
A sarcomere extends from one Z-line to the next Z-line, and these boundaries move closer during contraction. Students may choose the M-line because it lies at the centre of the sarcomere, but it is a central landmark rather than a boundary.
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