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6.5 Neurons and Synapses


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

Simple Neuromuscular Reflexes

Experiment #4 from Human Physiology Experiments

  • Graph the electrical activity of a muscle activated by a reflex arc through nerves to and from the spinal cord.
  • Compare the relative speeds of voluntary and reflex muscle activation.
  • Associate muscle activity with involuntary activation.
  • Observe the effect of central nervous system influence on reflex amplitude.
  • Calculate the approximate speed of a nerve impulse.
  • Compare reflex response and electrical amplitude in different subjects.

Educational Standard
International Baccalaureate (IB)
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.