question archive Cell membranes contain channels that allow ions to cross the phospholipid bilayer
Cell membranes contain channels that allow ions to cross the phospholipid bilayer
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Cell membranes contain channels that allow ions to cross the phospholipid bilayer. Suppose that a particular potassium channel carries a current of 2.1 pA. How many potassium ions (K ) pass through it in 1.0 ms?
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Answer:
charge on 1 potassium ion = 1.6*10^-19 C
Total charge passed = I*t = 2.1*10^-12 * 1*10^-3 = 2.1*10^-15 C
number of pottasium ion = total charge /charge of 1 ion
=2.1*10^-15 / (1.6*10^-19)
=13125 ion
Ans: 13125 ions
