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Chapter 10. Calcium, phosphate and magnesium metabolism
Previous Chapter Next Chapter Self-Assessment for this chapter
Keypoints
- Calcium and phosphate precipitate as calcium phosphate if their concentration is too high
- Both calcium and phosphate can bind proteins.
- Calcium or phosphate which is not bound to proteins is freely filtered in the glomerulus
- Along the nephron calcium and phosphate are both reabsorbed but not secreted.
- Most reabsorption of calcium and phosphate is in the proximal tubule
- Phosphate is reabsorbed by co transport with sodium in the proximal tubule
- Calcium is reabsorbed by a paracellular route in the proximal tubule calbindins bind calcium and transport it across distal tubular cells
- Magnesium that is not protein bound is filtered in the glomerulus and reabsorbed along the tubules.
Self-Assessment Questions for this Chapter