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 What effect did increasing the extracellular potassium have on the resting membrane potential?
What effect did increasing the extracellular potassium have on the resting membrane potential?
   The resting membrane potential became less negative.
   The resting membrane potential became more negative.
   The resting membrane potential did not change.
   The resting membrane potential disappeared.
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Part B
What effect did decreasing the extracellular sodium have on the resting membrane potential?
What effect did decreasing the extracellular sodium have on the resting membrane potential?
   The resting membrane potential became less negative.
   Only a small change occurred, because the sodium channels were mostly open.
   The resting membrane potential disappeared.
   Only a small change occurred, because the resting neuron is not very permeable to sodium.
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