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C2.1.3—Hormones, neurotransmitters, cytokines and calcium ions as examples of functional categories of signalling chemicals in animals

Experiments

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

Introduction to Neurotransmitters using AChE

Experiment #16 from Advanced Biology with Vernier

In this experiment, you will

  • Observe the reaction rate of acetylcholinesterase (AChE) found in heart tissue.
  • Compare the reaction rate of AChE from different fractions of heart tissue.
  • Observe the effect that the compound tacrine has on the reaction rate of AChE.
  • Generate a dose-response curve for the compound tacrine.
  • Estimate the effective IC50 of tacrine on heart AChE.

Educational Standard
International Baccalaureate (IB) 2025
Subject
Biology
Theme
C Interactions and interdependence
Level of organization
2 Cells
Topic
C2.1 Chemical signalling
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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