During muscle contraction, which of the following events occur?

(a) H-zone disappears
(b) A-band widens
(c) I-band reduces in width
(d) Width of A-band in unaffected
(e) M line and Z line come closer

a, b and e

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a, c, d and e

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b, d and e

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a, b and c

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Solution

The correct option is B
a, c, d and e

There is no affect on A-band during muscle contraction.

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Similar questions

During muscular contraction, which of the following events occur?

(i) H – zone disappears (ii) A band widens

(iii) I – band reduces in width (iv) Width of A band is unaffected

(v) M line and Z line come closer

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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