Nervous Coordination (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 is the typical resting potential value in human neurones?
What is the typical resting potential value in human neurones?
-65mV
How many sodium and potassium ions does the Na-K pump move per cycle?
How many sodium and potassium ions does the Na-K pump move per cycle?
3 out, 2 in
What voltage does the membrane reach at peak action potential?
What voltage does the membrane reach at peak action potential?
+40mV
Which ion channels are mainly open during resting potential?
Which ion channels are mainly open during resting potential?
Potassium channels
What causes further depolarisation during stage 3 of action potential?
What causes further depolarisation during stage 3 of action potential?
influx opens more channels
What is hyperpolarisation?
What is hyperpolarisation?
Inside more negative than usual
How long does a typical action potential last?
How long does a typical action potential last?
1-2 milliseconds
Which process requires direct energy input?
Which process requires direct energy input?
Maintaining resting potential
What initiates depolarisation when a stimulus is detected?
What initiates depolarisation when a stimulus is detected?
Sodium channels open
What role does the phospholipid bilayer play in the axon membrane?
What role does the phospholipid bilayer play in the axon membrane?
Prevents free movement of and ions