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IB Biology HL C2.2.6 Neurotransmitter Release Questions

Practise IB Biology HL 2.2.6 by analysing synaptic transmission mechanisms and evidence from neural experiments.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Explain how an arriving action potential opens calcium channels, causes vesicle fusion and releases neurotransmitter into the synaptic cleft.

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Study C2.2.6—Neurotransmitter release conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Biology HL C2.2.6 Neurotransmitter Release Questions question 1

[Maximum number: 3]

The diagram shows part of two neurons.

Figure for Question IB Biology HL C2.2.6 Neurotransmitter Release Questions question 1 — IB Biology HL

X indicates the movement of a structure in the neuron. Explain what events trigger this movement and what happens next.

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