CIE IGCSE Biology: 复习笔记:9.1.4 Monitoring Activity of the Heart

CIE IGCSE Biology: 复习笔记:9.1.4 Monitoring Activity of the Heart

Monitoring Activity of the Heart

  • Heart activity can be monitored by using an ECG, measuring pulse rate or listening to the sounds of valves closing using a stethoscope
  • Heart rate (and pulse rate) is measured in beats per minute (bpm)
  • To investigate the effects of exercise on heart rate, record the pulse rate at rest for a minute
  • Immediately after they do some exercise, record the pulse rate every minute until it returns to the resting rate
  • This experiment will show that during exercise the heart rate increases and may take several minutes to return to normal

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