What actually leads to shortening of a sarcomere?

What is a sarcomere?

What is sarcomere ?

Assertion: The portion of the myofibril between two successive Z-lines is considered as the functional unit of contraction called sarcomere. Reason: During contraction, l-bands get reduced whereas A-bands retain the length , thereby causing shortening of the sarcomere.

What do you mean by softening of lead ?

A sarcomere is :

Look at the given diagram of events during muscle contraction, named as A,B,C. Identidy the diagram that shows gradual shortening of length of Sarcomere :-

What factors could lead to the rise of a new species?

In the transpiration pull theory, what causes the tension that leads to lifting of the water column?

Which of the following disorders is caused due to shortening of eyeball in anteroposterior axis and can be corrected using convex lens?