As a muscle is stretched, the Z discs move further apart, and the I band increases in size. What is the role if titin in this situation?

Question

Quizplus · Accepted Answer

Titin is a large protein that functions as a molecular spring in muscle fibers. It spans the entire length of the sarcomere, from the Z discs to the M line, and helps to anchor the thick filaments in place. As the muscle is stretched, titin is also stretched and resists the tension, preventing the sarcomere from being pulled apart.

As a Muscle Is Stretched, the Z Discs Move Further