Ouabain Is a Toxin That Works by Permanently Inhibiting the Activity

question 21

Multiple Choice

Ouabain is a toxin that works by permanently inhibiting the activity of sodium-potassium pumps embedded in neuronal membranes.How would ouabain administration affect the resting potential of a neuron?

• A)The magnitude of the resting potential would decrease toward zero.
• B)The resting potential would hyperpolarize toward a more negative value.
• C)The resting potential would reverse to a positive,rather than a negative,value.
• D)Application of ouabain would not affect the resting potential.

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