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C3.1.14—Feedback control of heart rate following sensory input from baroreceptors and chemoreceptors

Experiments

Here are experiments our science specialists have selected to support this IB* topic.

Heart Rate

Experiment #15 from Investigating Biology through Inquiry

In this Preliminary Activity, you will use a Heart Rate Monitor to determine a subject’s heart rate. After completing the Preliminary Activity, you will first use reference sources to find out more about the heart, the cardiovascular system, and heart rate before you choose to investigate a researchable question dealing with heart rate. Depending on sensor availability and your interest, you might decide to use another sensor, such as a Blood Pressure Sensor, in addition to a Heart Rate Monitor. Some topics to consider in your reference search are:

  • heart
  • heart rate
  • cardiovascular system
  • physical fitness
  • maximum cardiac rate
  • homeostasis
  • sympathetic nervous system
  • parasympathetic nervous system
  • heart-rate recovery time
  • fitness index
  • baroreceptor reflex
  • diving reflex

Homeostasis and Autonomic Reflexes

Experiment #6 from Human Physiology Experiments

  • Observe pulse response to sudden squatting.
  • Observe pulse response to sudden standing from a squatting position.

Educational Standard
International Baccalaureate (IB) 2025
Subject
Biology
Theme
C Interactions and interdependence
Level of organization
3 Organisms
Topic
C3.1 Integration of body systems
Section
Standard level and higher level

* The IB Diploma Program is an official program of the International Baccalaureate Organization (IBO) which authorizes schools to offer it. The material available here has been developed independently of the IBO and is not endorsed by it.

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