Texas Esthetician License Practice Exam

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Prepare for the Texas Esthetician License Exam. Dive into flashcards and multiple-choice questions, each with hints and explanations. Boost your readiness for the test!

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The skeletal system stores most of the body's __________ supply?

Iron
Calcium
Vitamin D
Potassium

The correct answer is: Calcium

The skeletal system primarily serves as a reservoir for calcium in the body. Calcium is essential for various bodily functions, including muscle contraction, nerve transmission, and blood clotting. The bones store about 99% of the body's calcium, making them the main site for this mineral's storage and regulation. When the body requires calcium for these physiological processes, the skeletal system can release it into the bloodstream. Iron, while important for oxygen transport in the blood and a component of hemoglobin, is mainly stored in the liver, spleen, and bone marrow, but not predominantly in the skeletal system. Vitamin D is crucial for the absorption of calcium and phosphorus but is not stored in the bones. Potassium is vital for maintaining cellular function and fluid balance but is also not stored in the skeletal system. Hence, the skeletal system is most closely associated with the storage of calcium.