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Test Your Knowledge on Heart Rate Regulation
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Test Your Knowledge on Heart Rate Regulation

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Questions and Answers

Which of the following factors increases the slope of phase 4 in the SA node and leads to positive chronotropy?

  • Acetylcholine
  • Parasympathetic activity
  • Sympathetic activity (correct)
  • Serotonin

    • What is the effect of Pl-adrenoreceptors on the heart rate?

  • Decreases heart rate
  • No effect on heart rate
  • Increases heart rate (correct)
  • Stabilizes heart rate

    • What is the role of c-AMP in the regulation of heart rate?

  • Decreases heart rate
  • No effect on heart rate
  • Stabilizes heart rate
  • Increases heart rate (correct)

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