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IB Biology Topic C2.2 Neural Signalling (SL/HL) covers syllabus content as part of Topic C2: Cells under Theme C: Interaction and Interdependence. Use these Notes, Questionbank, Videos, Flashcards, and Lessons to review the topic, practise exam questions, and move between notes, videos, flashcards, and lessons where available.
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C2.2.1 Neurons as cells within the nervous system that carry electrical impulses
C2.2.2 Generation of the resting potential by pumping
C2.2.3 Nerve impulses as action potentials that are propagated along nerve fibres
C2.2.4 Variation in the speed of nerve impulses
C2.2.5 Synapses as junctions between neurons and between neurons and effector cells
C2.2.6 Release of neurotransmitters from a presynaptic membrane
C2.2.7 Generation of an excitatory postsynaptic potential
C2.2.8 Depolarization and repolarization during action potentials (HL)
C2.2.9 Propagation of an action potential along a nerve fibre/axon (HL)
C2.2.10 Oscilloscope traces showing resting potentials and action potentials (HL)
C2.2.11 Saltatory conduction in myelinated fibres to achieve faster impulses (HL)
C2.2.12 Effects of exogenous chemicals on synaptic transmission (HL)
C2.2.13 Inhibitory neurotransmitters and generation of inhibitory postsynaptic potentials (HL)
C2.2.14 Summation of the effects of excitatory and inhibitory neurotransmitters (HL)
C2.2.15 Perception of pain by neurons with free nerve endings in the skin (HL)
C2.2.16 Consciousness (HL)