Active Transport of Sodium and Potassium Ions

To the Editor: The first article of the new Basic Science series, "Active Transport of Sodium and Potassium Ions," 1 is a nice review of the conventional approach to this aspect of cell physiology. However, a growing number of scientists think that the asymmetric distribution of sodium and potassium between cells and their environments is not at all due to active transport by a membrane pump. There is no question that ATP has a role in biologic work performance, that epithelial tissues perform work in actively transporting solutes across them, that cells within epithelial tissues are parts of the machinery of . . . No extract is available for articles shorter than 400 words.