Which Statement About the Vertebrate Heart Is True

question 74

Multiple Choice

Which statement about the vertebrate heart is true?

• A) Intercalated discs are areas of physical weakness between adjacent cells.
• B) Gap junctions provide strong mechanical adhesions between adjacent cells.
• C) Pacemaker cells initiate the heartbeat and lack actin and myosin filaments.
• D) Gap junctions electrically couple cardiac muscle cells.
• E) The vertebrate heart is arrhythmic.

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