) For an ion with positive valence, what does the ratio of concentration outside to inside need to be for the Nernst potential to be negative, 0, or positive ? b) If the value of K_out were changed to 160mM in a mammalian neuron, and the resting potential was -60 mV. Which way would potassium want to move?
) For an ion with positive valence, what does the ratio of concentration outside to inside need to be for the Nernst potential to be negative, 0, or positive ? b) If the value of K_out were changed to 160mM in a mammalian neuron, and the resting potential was -60 mV. Which way would potassium want to move?
Chapter8: Sampling, Standardization, And Calibration
Section: Chapter Questions
Problem 8.15QAP
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1) a) For an ion with positive valence, what does the ratio of concentration outside to inside need to be for the Nernst potential to be negative, 0, or positive ?
b) If the value of K_out were changed to 160mM in a mammalian neuron, and the resting potential was -60 mV. Which way would potassium want to move?
c) Keeping the temperature constant choose 5 values of K_in or K_out (keep one constant and vary the other) from K_in < K_out to K_in > K_out. Plot the Nernst potential vs (K_out over K_in) and use a log fit to fit the data (label your axes). What is the interpretation of the coefficient of the ln term?.
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