Q.

Regarding the structure of cardiac muscle, which statement is INCORRECT?

A. T-system lies at Z-lines
B. functions as a syncytium due to the presence of tight junctions
C. intercalated discs occur at Z-lines
D. contains large numbers of elongated mitochondria
E. thin filaments include troponin T, C and I
Answer» B. functions as a syncytium due to the presence of tight junctions
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