Under Which Conditions Would the Sodium-Potassium Pump Likely Be Far

Multiple Choice

 Under which conditions would the sodium-potassium pump likely be far less effective in creating a concentration gradient?

A) if dendrites were generally longer than axons
B) if the glia-to-neuron ratio were higher
C) if selective permeability of the membrane did not exist
D) if it were an active transport system that required energy