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drlightening drlightening
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7 years ago Edited: 7 years ago, drlightening
A resting cell is permeable to Na+ (ENa = +135mV), K+ (Ek = -90mV), and Ca2+ (ECa2+ = +256mV). If the resting membrane potential is -50mV, which ion is the cell most permeable to?
A) Na+
B) Ca2*
C) K+
D) Na+ and Ca2+
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Staff Member
7 years ago
K+

This is my guess b/c there are more K⁺ leak channels than Na⁺ ones
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