Raising the potassium ion concentration in the extracellular fluid surrounding a nerve cell will have what effect?
A) depolarize it
B) hyperpolarize it
C) increase the magnitude of the potassium equilibrium potential
D) decrease the magnitude of the potassium equilibrium potential
E) both hyperpolarize it and decrease the magnitude of the potassium equilibrium potential
Question 2
Ions can move across the plasma membrane in which of the following ways?
A) through voltage-gated channels as in the action potential
B) through passive or leak channels
C) by ATP-dependent ion pumps like the sodium-potassium exchange pump
D) through chemically gated channels as in neuromuscular transmission
E) All of the answers are correct.
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