When a neuron is at rest, what is its electrical charge?
a) -80 millivolts
b) +70 millivolts
c) -70 millivolts
d) +50 millivolts
e) -60 millivolts
Question 2
The sodium-potassium pump
a) exchanges three Na+ ions inside the cell for two K+ ions that are outside the cell.
b) exchanges three K+ ions inside the cell for two Na+ ions that are outside the cell.
c) exchanges two Na+ ions inside the cell for three K+ ions that are outside the cell.
d) exchanges two K+ ions inside the cell for every three Na+ ions that are outside the cell.
e) exchanges two K+ ions inside the cell for every two Na+ ions that are outside the cell.
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