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Question
Read the statements carefully and comment on them.
A. A bands of muscle fibre are dark and contain myosin.
B. I bands of muscle fibre are light and contain actin.
C. During muscle contraction, the A bands contract.
D. The part between two Z lines is called sarcomere.
E. The central part of the thin filament not overlapped by the thick filament is the H zone.
Read the statements carefully and comment on them.
A. A bands of muscle fibre are dark and contain myosin.
B. I bands of muscle fibre are light and contain actin.
C. During muscle contraction, the A bands contract.
D. The part between two Z lines is called sarcomere.
E. The central part of the thin filament not overlapped by the thick filament is the H zone.
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Solution
The correct option is D A, B and D are correct, while C and E are incorrect.
A bands of muscle fibre are dark and contain myosin. I bands of muscle fibre are light and contain actin. The part between two successive Z lines is called a sarcomere. During muscle contraction, the I bands contract. The central part of a thin filament not overlapped by a thick filament is the Z line.
A, B and D are correct, while C and E are incorrect.
A bands of muscle fibre are dark and contain myosin. I bands of muscle fibre are light and contain actin. The part between two successive Z lines is called a sarcomere. During muscle contraction, the I bands contract. The central part of a thin filament not overlapped by a thick filament is the Z line.
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