Passage of Action Potentials (AQA A-Level Biology): Flashcards
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Practise the cards
10 cards from this deck
Resting membrane potential value
Resting membrane potential value
Approximately
Mechanism of action potential propagation
Mechanism of action potential propagation
Localised circuits
Propagation in unmyelinated axons
Propagation in unmyelinated axons
Continuous wave along entire membrane
Channels opening during depolarisation
Channels opening during depolarisation
Sodium voltage-gated channels
Sodium-potassium pump function
Sodium-potassium pump function
Restores resting potential, transports ions back
Nodes of Ranvier spacing
Nodes of Ranvier spacing
Every along axon
Saltatory conduction definition
Saltatory conduction definition
Action potentials jump between nodes of Ranvier
Speed in myelinated vs unmyelinated axons
Speed in myelinated vs unmyelinated axons
Myelinated faster
Energy use in myelinated vs unmyelinated
Energy use in myelinated vs unmyelinated
Myelinated lower energy
Depolarisation sites in myelinated axons
Depolarisation sites in myelinated axons
Nodes of Ranvier only