Physics please help

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During an action potential, Na^+ ions move into the cell at a rate of about 3x10^-7 mol/m^2*s.

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 40cm long and 30um in diameter.

Please help me out I am lost. Thanks

  • Physics please help -

    I am not familiar with the terminology. How can a "potential" be an event or a time interval?

    Power = (current) x (voltage)

    The voltage is apparently 30*10^-3 V

    Convert the 3x10^-7 mol/(m^2*s) to
    coulombs/(m^2*s)
    1 mole of Na+ ions contains 6.02*10^23 ions with a charge of 9.63*10^4 Coulombs. Your ion flux is 2.89*10^-2 Amps/m^2

    Multiply that by the appropriate axon area.

  • Physics please help -

    Can you please help out am still stuck one this

  • Physics please help -

    During an action potential, Na^+ ions move into the cell at a rate of about 3x10^-7 mol/m^2*s.

    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 40cm long and 30um in diameter.

    Please help me out I am lost. Thanks
    Physics please help - drwls, Sunday, February 10, 2013 at 12:52pm
    I am not familiar with the terminology. How can a "potential" be an event or a time interval?

    Power = (current) x (voltage)

    The voltage is apparently 30*10^-3 V

    Convert the 3x10^-7 mol/(m^2*s) to
    coulombs/(m^2*s)
    1 mole of Na+ ions contains 6.02*10^23 ions with a charge of 9.63*10^4 Coulombs. Your ion flux is 2.89*10^-2 Amps/m^2

    Multiply that by the appropriate axon area.
    Physics please help - John, Tuesday, February 12, 2013 at 1:25am



    Can you please help out am still stuck one this!!!

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