Cardiac Muscle Fibers are Joined at Their Ends by Dense

Question

Cardiac muscle fibers are joined at their ends by dense bands called _______.
A) Purkinje fibers
B) intercalated disks
C) AV fibers
D) cardiac disks

Accepted Answer

Intercalated disks are specialized cell-to-cell junctions that connect adjacent cardiac muscle cells, or fibers. They contain gap junctions that allow for rapid electrical communication between cells and desmosomes that anchor the cells together during contraction.