When Comparing Cardiac Muscle Cells and Skeletal Muscle Cells

Multiple Choice

When comparing cardiac muscle cells and skeletal muscle cells,

A) the rate of action potential propagation is faster in cardiac muscle.
B) both possess intercalated discs.
C) only skeletal muscle has a plateau phase in its contraction cycle.
D) action potentials are conducted from cell to cell only in cardiac muscle.
E) both are voluntary.