Ouabain Is a Toxin That Works by Permanently Inhibiting the Activity

question 24

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 shift 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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Definitions:

Cash Flow Recovery

The process of regaining the cash that was used in investments or incurring costs, often evaluated in terms of investment payback period or returns.

Net Working Capital

A comparison of a company's short-term assets versus its short-term obligations, indicating its fiscal health in the immediate future.

Capital Cost Allowance (CCA)

A taxable expense in Canadian tax law that represents a yearly deduction for the depreciation of property used in a business or profession.