If the extracellular fluid around a neuron is replaced with an isotonic saline solution that contains K⁺ and other solutes at concentrations very close to the extracellular fluid concentrations of a normal cell, the result is A) no resting membrane potential. B) hyperpolarized membrane. C) depolarized membrane. D) a resting membrane potential close to its normal value. E) None of the choices are correct.

Question

Quizplus · Accepted Answer

Replacing the extracellular fluid around a neuron with an isotonic saline solution that closely mimics the ion concentrations of normal extracellular fluid would maintain the ion gradients necessary for generating a resting membrane potential. Therefore, the neuron would have a resting membrane potential close to its normal value.

If the Extracellular Fluid Around a Neuron Is Replaced with an Isotonic