Which Ion(s) Have a Net Chemical Force Acting to Move

question 13

Multiple Choice

Which ion(s) have a net chemical force acting to move the ion(s) into the cell? (Assume a resting membrane potential (V_m) of -70mV.)

• A) X⁺, whose [ECF] is 120 mM and [ICF] is 30 mM
• B) A ^-, whose [ECF] is 100 mM and [ICF] is 100 mM
• C) B ^-, whose [ECF] is 140 mM and [ICF] is 30 mM
• D) both X⁺ and B ^-ions
• E) X⁺, A ^-, and B ^-ions

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