Biology 9700 · AS & A Level · The microscope in cell studies

The microscope in cell studies — practice question

An abnormal heartbeat may happen because the atria receive electrical stimulation that is ineffective. Which part of the heart could be damaged, leading to this abnormal heartbeat?

  • Aatrioventricular node
  • Bseptum
  • CPurkyne tissue
  • Dsinoatrial node

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