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Resting Potential and Action Potential
Grade Level
Psychology
PSY.058 Resting Potential and Action Potential
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Which sequence best explains how the membrane can be negative at rest even though both sodium and potassium are positive ions?
A
Ion gradients and selective permeability create a negative interior; later Na+ entry and K+ exit change that voltage
B
Sodium and potassium become negative at rest, then switch back to positive during firing
C
Positive ions cannot cross membranes, so voltage changes happen without sodium or potassium
D
The inside is negative only after neurotransmitters enter the axon terminal first
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