Intercalated Disks Are Cell- Cell Junctions Found Between Cardiac Muscle

Intercalated disks are cell- cell junctions found between cardiac muscle cells. A feature of intercalated disks is a large number of gap junctions. This means

A) an extension of smooth endoplasmic reticulum goes through the gap junction, making it continuous from one cardiac muscle cell to the next.
B) water and small ions can readily pass from one cardiac muscle cell to the next.
C) RNA from one cardiac muscle cell can be transported into an adjacent cell through the gap junction.
D) the plasma membrane encompasses multiple cardiac muscle cells.