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  • During muscular contraction , which of the following events occur ?  1) H-zone disappears  2) A-band widens  3) I-bands reduces in width  <p

During muscular contraction , which of the following events occur ? 

1) H-zone disappears 

2) A-band widens 

3) I-bands reduces in width 

4) Width of A-band is unaffected 

5) M-line and Z-line come closer 

Option: 1

1,3,4 and 5 


Option: 2

1,2 and 5 


Option: 3

2,4 and 5 


Option: 4

1,2 and 3 


Answers (1)

best_answer

As we have learned

Contractions -

Occurrence of contractions

- wherein

pulls the attached actin filaments towards the centre of ‘A’ band. The ‘Z’ line attached to these actins are also pulled inwards thereby causing a shortening of the sarcomere, i.e., contraction.

 

 

 

Posted by

Ritika Kankaria

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