What is the role of the "H" zone in a resting state myofibril?
What is the role of the "H" zone in a resting state myofibril?
To contract the sarcomere
To hold the thick filaments together
To separate the "A" and "I" bands
To represent the central part of the thick filament not overlapped by thin filaments
Solution
In a resting state, the edges of thin filaments on either side of the thick filaments partially overlap the free ends of the thick filaments leaving the central part of the thick filaments. This central part of thick filament, not overlapped by thin filaments is called the "H" zone.