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Questions and Answers
Which percentage represents the amount of magnesium found in muscle and other organs in the body?
Which percentage represents the amount of magnesium found in muscle and other organs in the body?
What is the primary protein to which magnesium is bound in the serum?
What is the primary protein to which magnesium is bound in the serum?
Which statement about the physiology of magnesium is correct?
Which statement about the physiology of magnesium is correct?
How much magnesium is typically found in a 70 kg human body?
How much magnesium is typically found in a 70 kg human body?
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What fraction of serum magnesium is complexed with other ions like phosphate and citrate?
What fraction of serum magnesium is complexed with other ions like phosphate and citrate?
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Study Notes
Magnesium Physiology Overview
- Magnesium (Mg2+) is the fourth most abundant cation in the human body and the second most abundant intracellular ion.
- A 70 kg human body contains approximately 1 mole (24 g) of Mg2+.
- Distribution: 53% of body Mg2+ is in bone, 46% in muscle/other organs and soft tissue, and less than 1% in serum and red blood cells.
- Serum Magnesium: About one-third of serum Mg2+ binds to proteins (primarily albumin). Of the remaining two-thirds, 61% is free/ionized and 5% is complexed (e.g., with phosphate and citrate).
- Physiologically Active Form: Like calcium (Ca2+), the free, ionized form of Mg2+ is the physiologically active form in the body.
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Description
This quiz explores the essential role of magnesium (Mg2+) in human physiology. Learn about its distribution in the body, its presence in various tissues, and the importance of its physiologically active form. Test your knowledge on magnesium's functions and significance in maintaining health.
