Medical Physiology, 3rd Edition

CHAPTER 36. Transport of Urea, Glucose, Phosphate, Calcium, Magnesium, and Organic Solutes

Gerhard Giebisch, Erich E. Windhager, Peter S. Aronson

The kidney plays a central role in controlling the plasma levels of a wide range of solutes that are present at low concentrations in the body. The renal excretion of a solute depends on three processes—filtration, reabsorption, and secretion (see pp. 732–733). The kidney filters and then totally reabsorbs some of the substances we discuss in this chapter (e.g., glucose). Others, it filters and also secretes (e.g., the organic anion para-aminohippurate [PAH]). Still others, the kidney filters, reabsorbs, and secretes (e.g., urea).

Urea

Glucose

Other Organic Solutes

Phosphate

Calcium

Magnesium

References