The Myosin Myofilaments are Anchored into the Cytoskeleton of the Cell

Question

The myosin myofilaments are anchored into the cytoskeleton of the cell by the __________.
A) Z disks
B) A band
C) M line
D) I band
E) H zone

Accepted Answer

The myosin myofilaments are anchored into the cytoskeleton of the cell by the M line, which runs down the center of the sarcomere and serves as a point of attachment for the myosin myofilaments. The Z disks mark the boundaries of the sarcomere, while the A band contains both thick and thin myofilaments and the H zone contains only thick myofilaments. The I band is the region of the sarcomere that contains only thin myofilaments.