A) Length of H zone decreases
B) Length of A band decreases
C) Length of I band remain constant
D) Length of two Z line increases
Correct Answer: A
Solution :
When a muscle fibre is contracted its A band remains intact and I band shortens. H zones also disappear as the actin filaments of both sides in each macromere may overlap each other at M line.You need to login to perform this action.
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