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NEETZoologyLocomotion and Movement

Skeletal Muscle Component Function A. Actin Filament 1. Provides support to the thick filaments and holds them together B. Myosin Filament 2. Forms the thin filaments, involved in muscle contraction C. M-line 3. Appears light under a microscope, contains only thin filaments D. I-band 4. Forms the thick filaments, has ATPase activity for muscle contraction

Options

  1. AA - 3, B - 1, C - 2, D - 4
  2. BA - 1, B - 3, C - 4, D - 2
  3. CA - 4, B - 2, C - 3, D - 1
  4. DA - 2, B - 4, C - 1, D - 3

Correct answer

D. A - 2, B - 4, C - 1, D - 3

Step-by-step solution

Actin Filament: Forms the thin filaments and interacts with myosin during muscle contraction. Myosin Filament: Forms the thick filaments, has ATPase activity that powers muscle contraction. M-line: Provides structural support and holds the thick filaments in place. I-band: The light band that contains only actin (thin) filaments.

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