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6.2 The Blood System

Experiments

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

Inquiry

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

Monitoring EKG

Experiment #28 from Biology with Vernier

In this experiment, you will

  • Use the EKG Sensor to graph your heart’s electrical activity.
  • Determine the time interval between EKG events.
  • Calculate heart rate based on your EKG recording.

Illustration of ventricular contraction

Blood Pressure and Autonomic Reflexes

Experiment #1 from Human Physiology Experiments: Volume 2

  • Obtain graphical representation of blood pressure.
  • Compare blood pressure before and after exposure to cold stimulus.
  • Observe an example of sympathetic nervous system activation (“fight or flight” response).

Educational Standard
International Baccalaureate (IB)
Subject
Biology
Section
Core
Topic
6. Human physiology

* 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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