Magnesium (Mg)

Definition

Magnesium (Mg) is an essential mineral and electrolyte crucial for numerous biochemical processes in the body, including nerve function and muscle contraction. It also plays a significant role in maintaining normal heart rhythm and bone health.

5 Must Know Facts For Your Next Test

1. Magnesium is vital for enzyme function, with over 300 enzymatic reactions dependent on it.
2. Normal serum magnesium levels range from 1.7 to 2.2 mg/dL.
3. Hypomagnesemia (low magnesium) can lead to symptoms such as muscle cramps, seizures, and cardiac arrhythmias.
4. Hypermagnesemia (high magnesium) often results from renal failure or excessive intake of magnesium-containing medications.
5. Common dietary sources of magnesium include green leafy vegetables, nuts, seeds, and whole grains.

Review Questions

• What are the normal serum magnesium levels?
• Which symptoms are associated with hypomagnesemia?
• Name three dietary sources of magnesium.

Related terms

Hypomagnesemia: A condition characterized by low levels of magnesium in the blood.

Hypermagnesemia: A condition characterized by high levels of magnesium in the blood.

Electrolytes: Minerals in your blood and other body fluids that carry an electric charge essential for various physiological functions.