IB Biology HL 2.2.7 Excitatory postsynaptic potentials Question Bank
Practise IB Biology HL 2.2.7 by analysing how transmitter binding and receptor action initiate postsynaptic responses.
- Syllabus
- First assessment 2025
- Course
- Biology HL
- Level
- HL
Exam points
- Analyse how acetylcholine and receptor binding change postsynaptic ion flow.
- Explain the sequence from transmitter release to a postsynaptic action potential.
C2.2.7—Excitatory postsynaptic potential question 1
Cholinergic synapses use acetylcholine as their neurotransmitter. They are widespread in the body, passing on signals to muscle cells. These synapses are affected by neonicotinoid pesticides.
The diagrams, which are not drawn to scale, show the synapse between two neurons and a detail of the synaptic cleft.
Explain how acetylcholine initiates an action potential in a postsynaptic membrane.
All question bank results loaded