Cardiac muscle cells

a. do not contract by a sliding filament mechanism.
b. are similar to those of smooth muscle in being
nonstriated.
c. have fewer mitochondria than skeletal muscle
cells do.
d. possess numerous gap junctions on their sides,
favoring rapid spread of excitation.
e. have intercalated disks with tight junctions at
their branching ends.


Answer: d

Biology & Microbiology

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