Ion velocity through ion channel 5.1 In cells, ions often flow through conduits

Question

Ion velocity through ion channel

5.1 In cells, ions often flow through conduits in the membrane known as ion channels. These channels allow the passage of various kinds of charged particles through the nonpolar membrane. A particular channel exchanges positively- charged hydrogen ions with negatively-charged carbonate ions. Assume that during the time the channel is open, 4.9 X 10^9 H+ ions flow into the cell and the same amount of C03- ions flow out. Given that the length of a typical ion channel is 16 A and that the current produced is 6.2 X 10^-12A, what is the average velocity of the ions in cm/s? Assume that all the ions fit entirely within the channel at one time.

Explanation / Answer

16 Angstrom = 1.6 nm = 1.6

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