Smooth Muscle Differs from Both Cardiac and Skeletal Muscle in That

question 41

Multiple Choice

Smooth muscle differs from both cardiac and skeletal muscle in that

• A) it can act as a pacemaker for rhythmic contractions.
• B) contractions of smooth muscle are not due to Ca²⁺ influx into the sarcoplasm.
• C) neighboring cells in smooth muscle are electrically coupled by gap junctions.
• D) neighboring cells in smooth muscle are tightly connected by intercalated discs.
• E) its actin and myosin show no repeating pattern of arrangement when viewed under a microscope.

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