BOOKS
Harrison's Principles of Internal Medicine. Ed. Anthony S. Fauci, et al. New York: McGraw-Hill, 1997.
PERIODICALS
Fried, L. F., and P. M. Palevsky. "Hyponatremia and hypernatremia." Medical Clinics of North America 81 (1997): 585-609.
Frizzell, R. T., et al. "Hyponatremia and ultramarathon running." Journal of the American Medical Association 255(1986): 772-774.
Tom Brody, PhD
KEY TERMS
Blood plasma and serum—Blood plasma, or plasma, is prepared by obtaining a sample of blood and removing the blood cells. The red blood cells and white blood cells are removed by spinning with a centrifuge. Chemicals are added to prevent the blood's natural tendency clot. If these chemicals include sodium, then a false measurement of plasma sodium content will result. Serum is prepared by obtaining a blood sample, allowing formation of the blood clot, and removing the clot using a centrifuge. Both plasma and serum are light yellow in color.
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