Question

Which of the following features define the boundaries of sarcomeres?

A) A bands
B) H Zones
C) M lines
D) Z discs

Answer 1

Z discs define the boundaries of sarcomeres. Each sarcomere is the space between two consecutive Z discs. Sarcomeres are the functional units of skeletal muscle.

Step-by-step explanation:

The features that define the boundaries of sarcomeres are Z discs. Each sarcomere is the space between two consecutive Z discs. Z discs mark the border of sarcomeres, which are the functional units of skeletal muscle. A myofibril is composed of many sarcomeres running along its length.