Intercalated Disks Are Cell- Cell Junctions Found Between Cardiac Muscle

question 26

Multiple Choice

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.

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