The biochemistry that takes place inside cells depends on various elements, such as sodium, potassium, and calcium,
Question:
The biochemistry that takes place inside cells depends on various elements, such as sodium, potassium, and calcium, that are dissolved in water as ions. These ions enter cells through narrow pores in the cell membrane known as ion channels. Each ion channel, which is formed from a specialized protein molecule, is selective for one type of ion. Measurements with micro-electrodes have shown that a 0.30-nm-diameter potassium ion (K+) channel carries a current of 1.8 pA.
a. How many potassium ions pass through if the ion channel opens for 1.0 ms?
b. What is the current density in the ion channel?
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Solve a A current of 18 pA for the potassium ions means that a charge of 18 pC flows th...View the full answer
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Related Book For 
Physics for Scientists and Engineers A Strategic Approach with Modern Physics
ISBN: 978-0133942651
4th edition
Authors: Randall D. Knight
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