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STD 11 - 17. Locomotion and movement — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYSTD 11 - 17. Locomotion and movement1 Mark
MCQ
Myofilaments or myofibrils are
  • A
    Obliquely arranged filaments of muscle fibre
  • ✓
    Parallely arranged filaments of muscle fibre
  • C
    Horizontally arranged filaments of muscle fibre
  • D
    Radially arranged filaments of muscle fibre
✓

Answer

Correct option: B.
Parallely arranged filaments of muscle fibre
b
Parallely arranged filament of muscle fibre. Each muscle fibre is lined by the plasma membrane called sarcolemma enclosing the sarcoplasm. Muscle fibre is a syncitium as the sarcoplasm contains many nuclei. The endoplasmic reticulum, $i.e.$, sarcoplasmic reticulum of the muscle fibres is the store house of calcium ions. A characteristic feature of muscle fibre is the presence of large number of parallely arranged filaments in the sarcoplasm called myofilaments or myofibrils

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