The resting membrane potential of a cell is –85 mV. The intracellular and extracellular concentrations of several ions are indicated below, as is the calculated Nernst equilibrium potentials (E) for these ions
The membrane has channels for Na+, K+, Cl- and Ca++. The conductance of the membrane is the greatest for which ion?
A. Na+
B. K+
C. Cl-
D. Ca++
ANS: B
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