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Sarcomere

Which stateme...

Question

Which statement is the correct for muscle contraction

A

Length of the H-zone decreases

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B

Length of A-band remains constant

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C

Length of I-band increases

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D

Length of two Z-lines increases

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Solution

The correct option is A Length of the H-zone decreases
Upon muscle contraction, the A-bands do not change their length, whereas the I-bands and the H-zone shorten. This causes the Z lines to come closer together.

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Similar questions

Q. Pick out the number of correct statements regarding muscle contraction-
i) length of

a

band remains
ii) length of

i

band decreases
iii)

Z

line are pulled to centre
iv)

M

line are remaining same

Q. During muscle contraction, which of the following shortens?
(i) A band
(ii) I band
(iii) Sarcomere

Q. Which of the following statements is/are correct/incorrect?
I. A-bands of the muscle is dark and contain myosin.
II. I-bands are the light bands and contain actin.
III. During muscle contraction, the A-band contracts
IV. The part between the two Z-lines is called a sarcomere.
V. The central part of thin filament, not overlapped by thick filament is called H-zone.
Select the correct answer using the codes given below:

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

Q. Which of the following statements is/are correct/incorrect?
I. A-bands of the muscle is dark and contain myosin.
II. I-bands are the light bands and contain actin.
III. During muscle contraction, the A-band contracts
IV. The part between the two Z-lines is called a sarcomere.
V. The central part of thin filament, not overlapped by thick filament is called H-zone.
Select the correct answer using the codes given below:

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