a cell with the following ion concentrations had a resting membrane potential of -40mV which of the following can you conclude?  Extracellular: Cl- = 110 mM, Na+ = 145 mM, K+ = 5mM. Intracellular Cl- = 20 mM, Na+ = 10 mM, K+ = 140mM a) At rest it is only permeable

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If a cell with the following ion concentrations had a resting membrane potential of -40mV which of the following can you conclude? 

Extracellular: Cl- = 110 mM, Na+ = 145 mM, K+ = 5mM.

Intracellular Cl- = 20 mM, Na+ = 10 mM, K+ = 140mM

a) At rest it is only permeable to potassium

b) At rest it has some permeability to more than one of these ions

c) At rest it is only permeable to chloride

d) Rest it is not permeable to sodium

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