Practice IB Biology Topic C2.2 Neural Signalling with authentic exam-style questions for both SL and HL students. This question bank focuses on the exact syllabus content for C2.2 Neural Signalling and mirrors Paper 1A, 1B, 2 style where relevant.
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Which statement best explains why the inside of a resting neuron is negative relative to the outside?
Which neurotransmitter is commonly used in both synapses and neuromuscular junctions?
EPSPs (excitatory postsynaptic potentials) are small depolarizations that accumulate to trigger an action potential in the postsynaptic cell.
Which dendrite feature increases summation of EPSPs?
In a pain reflex arc, what type of neuron connects the sensory and motor neurons in the spinal cord?
Which features are found in all neurons?
I. A cell body with nucleus
II. Dendrites for receiving signals
III. One or more myelinated axons