Anissa is working in an electrophysiology lab. She has isolatedan excitable patch of membrane in the cell, generates one actionpotential but then finds that she cannot generate any actionpotentials, even with the supre-threshold stimulation. Which of thefollowing statements could most likely account for thisscenario?
a) The cell Anissa is recording does not contain voltage gatedNa+ channels
b) The intracellular concentration of K+ ions is now higher thanthe extracellular concentration
c) The membrane contains voltage gated K+ channels that produceafter-hyperpolarizations
d) The voltage gated Na+ channels in the membrane are allpermanently inactivated
