Nervous transmission (9.5) | Edexcel A-level Biology B - 9BI0 | KnowledgeSet

Nervous transmission

Biology · A-Level · Edexcel · Edexcel A-level Biology B - 9BI0 · Specification point · 9.5 · Control Systems

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9.5 Nervous transmission

Students should:
$i Understand how the properties of the axon membrane and the transport of Na⁺ ions and K⁺ ions result in a resting potential. ii Understand how an action potential is formed and how it is propagated along an axon. iii Understand why the speed of transmission along myelinated axons is greater than along non-myelinated axons, including the role of saltatory conduction. iv Understand the structure and function of a synapse, including the role of transmitter substances limited to acetylcholine and noradrenaline. v Understand the formation and effects of excitatory and inhibitory postsynaptic potentials.$

Students should:

i Understand how the properties of the axon membrane and the transport of Na⁺ ions and K⁺ ions result in a resting potential. ii Understand how an action potential is formed and how it is propagated along an axon. iii Understand why the speed of transmission along myelinated axons is greater than along non-myelinated axons, including the role of saltatory conduction. iv Understand the structure and function of a synapse, including the role of transmitter substances limited to acetylcholine and noradrenaline. v Understand the formation and effects of excitatory and inhibitory postsynaptic potentials.