O-LevelBiologyCoordination & Response5090/11 · May/June 2025 · Q271 Mark
Which statements about synapses are correct? 1 Synapses are junctions between neurones. 2 Synapses ensure impulses travel in only one direction. 3 Neurotransmitter chemicals diffuse across synaptic gaps.
A1, 2 and 3
B1 and 2 only
C1 and 3 only
D2 and 3 only
✓ Correct answer
A: 1, 2 and 3
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