The following is true of cardiac muscle cells:
A. Intercalated discs contain desmosomes which are directly responsible for electrochemical and metabolic coupling
B. Intercalated discs contain gap junctions which are directly responsible for the spread of action potentials between cells
C. Intercalated discs are dense regions where calcium accumulates after it is released from the sarcoplasmic reticulum
D. The arrival of an action potential leads to the relaxation of the muscle cell
E. The arrival of an action potential allows for the sequestration of calcium in the sarcoplasmic reticulum
A. Intercalated discs contain desmosomes which are directly responsible for electrochemical and metabolic coupling
B. Intercalated discs contain gap junctions which are directly responsible for the spread of action potentials between cells
C. Intercalated discs are dense regions where calcium accumulates after it is released from the sarcoplasmic reticulum
D. The arrival of an action potential leads to the relaxation of the muscle cell
E. The arrival of an action potential allows for the sequestration of calcium in the sarcoplasmic reticulum