The boundary between adjacent sarcomeres is the
A)A band
B)H zone
C)Z line (disc)
D)I band
E)M line

Question

Quizplus · Accepted Answer

The Z line (also called Z disc) is the boundary between adjacent sarcomeres in a myofibril. It is where the actin filaments attach and serves as the anchor point for the sarcomere during muscle contraction. The A band (choice A), H zone (choice B), I band (choice D), and M line (choice E) are all structures within the sarcomere, but they do not mark the boundary between adjacent sarcomeres.

The Boundary Between Adjacent Sarcomeres Is the