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D3.3.1—Homeostasis as maintenance of the internal environment of an organism

Experiments

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

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.

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) 2025
Subject
Biology
Theme
D Continuity and change
Level of organization
3 Organisms
Topic
D3.3 Homeostasis
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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