The three major intracellular components—Mg2+, K+, and PO4-—usually travel together; therefore, the loss and deficiency of one constituent usually leads to the loss and deficiency of the others. As with most intracellular components, loss of total body Mg 2+ may occur when serum levels are normal.

ETIOLOGY A wide variety of problems can cause hypomagnesemia (TabJe 23-16). In adults, magnesium deficiencies are most frequently seen in alcoholics, in malnourished patients, and in patients with cirrhosis, pancreatitis, or excessive gastrointestinal fluid losses. Diarrhea is usually more of a problem (Mg 2+ content of 10 to 14 meq/L) than upper gastrointestinal loss (1 to 2 meq/L).

Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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