During an action potential, Na+ ions move into the cell at a rate of about 3×10−7mol/m2⋅s....

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Question

During an action potential, Na+ ions move into the cell at a rate of about 3×10−7mol/m2⋅s....

During an action potential, Na+ ions move into the cell at a rate of about 3×10−7mol/m2⋅s.

Part A

How much power must be produced by the "active Na+ pumping" system to produce this flow against a +30−mV potential difference? Assume that the axon is 20 cm long and 20 μm in diameter.

Express your answer using two significant figures.

ANSWER:

P =

v

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During an action potential, Na+ ions move into the cell at a rate of about 3×10−7mol/m2⋅s....

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During an action potential, Na+ ions move into the cell at a rate of about 3×10−7mol/m2⋅s....

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During an action potential, Na+ ions move into the cell at a rate of about 3×10−7mol/m2⋅s....