Explain how active transport and membrane permeability contribute to maintaining a resting potential of approximately -70 mV across the axon membrane of a neurone.
A researcher incubated a neurone in a medium containing potassium cyanide, a toxic substance that inhibits mitochondrial cytochrome c oxidase and prevents the synthesis of ATP. Following application of the cyanide, the resting potential of the neurone eventually changed from -70 mV to 0 mV. Explain why.
10 exam-style questions on AQA A Level Biology Nervous coordination (A-level only), covering Nerve impulses (A-level only) and Synaptic transmission (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.