alleryFunctional unit of skeletal muscle is the:
AATP
BCell
CMyosin
DSarcomere (segment between two Z-discs)
Answer & Solution
Correct answer: D. Sarcomere (segment between two Z-discs)
**Sarcomere:** contractile unit. Spans Z-line to Z-line.
Contains thin filaments (actin) anchored to Z, thick filaments (myosin) in center (M-line).
**Bands:** A (thick filament length, dark), I (thin only, light), H (thick only, in middle).
Shortens during contraction.
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