[Campbell Biology P.1175] In a skeletal muscle sarcomere, where are the thick filaments myosi... | Practice Question

In a skeletal muscle sarcomere, where are the thick filaments myosin primarily anchored, and where do the thin filaments actin attach?

  • A: Thick filaments attach at Z lines; thin filaments are anchored at the M line.
  • B: Both thick and thin filaments attach at the M line.
  • C: Thick filaments are anchored at the M line; thin filaments attach at the Z lines.
  • D: Both thick and thin filaments attach at the Z lines.

Explanation

The text explicitly states: 'Thin filaments attach at the Z lines at the sarcomere ends, while thick filaments are anchored in the middle of the sarcomere M line .'