Texas FFA Livestock Judging PracticeTest

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Enhance your skills in livestock judging with the Texas FFA Livestock Judging Test. Utilize flashcards and multiple choice questions, with hints and explanations to prepare effectively. Ace your exam!

Practice this question and more.

Which of the following minerals is classified as a trace mineral?

Calcium
Potassium
Magnesium
Selenium

The correct answer is: Selenium

Selenium is classified as a trace mineral because it is required by the body in very small amounts, typically measured in micrograms rather than milligrams. Trace minerals play essential roles in various biochemical processes, such as functioning as cofactors for enzymes, supporting metabolism, and maintaining overall health. Selenium, for instance, is important for antioxidant defense and is involved in the thyroid hormone metabolism. In contrast, calcium, potassium, and magnesium are classified as macrominerals because they are needed in larger quantities to support physiological functions like bone health (calcium), muscular and nerve function (potassium), and energy production (magnesium). The distinction between trace and macro minerals is based on the quantity required by the body, with trace minerals needed in significantly smaller amounts to fulfill their vital roles.