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

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYSTD 11 - 17. Locomotion and movement1 Mark
MCQ
During muscle contraction. What is false ?
  • ✓
    Diameter of fibre increases
  • B
    Size of ‘$H$’ zone becomes smaller
  • C
    Size of ‘$I$’ band decreases
  • D
    Size of ‘$A$’ bands remain the same
✓

Answer

Correct option: A.
Diameter of fibre increases
a
(a) During muscle contraction, both $I$ - band and $H$ - zone progressively shorten and eventually diappear while length of $A$ - band remains constant.

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