The E_K for a Cell Is -90 MV and E_NA

question 6

Multiple Choice

The E_K for a cell is -90 mV and E_NA is + 55 mV. At a resting membrane potential of -70 mV and assuming conductances ONLY to Na⁺ and K⁺,

• A) There is an inward K⁺ curr ent
• B) There is an outward Na⁺ current
• C) g_Na > g_K
• D) The Na,K-ATPase pumps Na⁺ into and K⁺ ou t of the ce ll
• E) The total current across the membrane is zero

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