Passage of Action Potentials (AQA A-Level Biology): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What happens to action potential amplitude as it travels along an axon?
What happens to action potential amplitude as it travels along an axon?
It remains constant
How does action potential propagation work?
How does action potential propagation work?
Through localised circuits
What is the resting membrane potential in an axon?
What is the resting membrane potential in an axon?
What opens to allow sodium ions to flood into the axon during depolarisation?
What opens to allow sodium ions to flood into the axon during depolarisation?
Sodium voltage-gated channels
What does the sodium-potassium pump do during recovery?
What does the sodium-potassium pump do during recovery?
Transports ions to original positions
How frequently do nodes of Ranvier occur along myelinated axons?
How frequently do nodes of Ranvier occur along myelinated axons?
Every
What is saltatory conduction?
What is saltatory conduction?
Jumping from node to node
What does the term 'saltatory' derive from?
What does the term 'saltatory' derive from?
Latin for 'jump'
Why is saltatory conduction more energy efficient?
Why is saltatory conduction more energy efficient?
Fewer ions need active transport
Where can depolarisation occur in myelinated axons?
Where can depolarisation occur in myelinated axons?
Only at nodes of Ranvier