Multiple Choice
Casey is taking a new medication that blocks potassium channels. What stage of an action potential would be MOST affected by this drug?
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Action Potentials
Multiple Choice
What happens when the neuron reaches threshold (-55 mV)?
A
Voltage-gated potassium channels open and potassium rushes into cell.
B
Voltage-gated sodium channels open and sodium rushes into the cell.
C
Voltage-gated potassium channels open and sodium channels close.
D
The sodium potassium pump immediately establishes resting potential.
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