Identify the structural characteristics of smooth muscle fibers
A) long fibers with T tubules, myofibrils, and sarcomeres
B) short fibers with T tubules, myofibrils, and intercalated discs
C) thick fibers with myofibrils and desmosomes
D) spindle shaped fibers that lack T tubules, myofibrils, and sarcomeres
E) round fibers that lack thin filaments and dense bodies
Answer: D
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