Which of the following statements about the maintenance of the resting membrane potential in a neuron is not correct?
The sodium-potassium pump actively transports three Na+\text{Na}^+Na+ ions out of the axon for every two K+\text{K}^+K+ ions it transports in.
At rest, the membrane is significantly more permeable to K+\text{K}^+K+ ions than to Na+\text{Na}^+Na+ ions.
The concentration of Na+\text{Na}^+Na+ ions is higher inside the axoplasm than in the extracellular fluid when the neuron is at rest.
The resting membrane potential is negative inside the axon relative to the outside, typically around −70 mV-70\text{ mV}−70 mV.
22 exam-style questions on OCR A A Level Biology Neuronal communication. Each one has a worked solution and a mark scheme showing where the marks go.