Functions and Sources of Minerals in the Human Body

The body also relies on electrolytes to manage fluid balance and electrical signaling. Sodium is necessary for fluid balance and nerve function. It is commonly found in table salt, meat, seafood, and milk. A lack of sodium can lead to physical weakness.

Potassium is equally critical for nerve and muscle function. It is abundant in potatoes, melons, citrus fruits, bananas, and various vegetables. Deficiency in potassium can result in muscle weakness and nerve disorders.

Exam Tip: Remember that both Sodium and Potassium are essential for nerve and muscle function, but they serve different roles in maintaining the body's electrical and fluid balance.

Trace Minerals

While the body needs them in much smaller quantities, trace minerals are just as indispensable for health and metabolism.

Iron and Iodine

Iron is a cornerstone of oxygen transport because it is necessary for hemoglobin production. Excellent sources include liver, red meat, egg yolks, nuts, and legumes. If iron levels drop, symptoms like numbness, tingling, and muscle spasms may occur.

Iodine is specifically required for the production of thyroid hormones, which regulate physical and mental development. It is found in seafood and iodized salt. A deficiency in iodine can lead to serious conditions such as goiter or hypothyroidism.

Selenium, Zinc, and Copper

Selenium acts as a powerful antioxidant and supports the body's immune mechanisms. It can be found in grains, meat, fish, and dairy products. A deficiency in selenium may lead to anemia.

Zinc is essential for wound healing, nutrient metabolism, and the digestion of carbohydrates. It is found in meat, seafood, and whole grains. Deficiency symptoms include delayed growth, rough skin, and a poor appetite.

Copper serves as a component of many enzymes required for various metabolic processes. It is found in legumes, grains, nuts, and organ meats. A lack of copper can lead to fatigue and anemia.

Fluoride and Manganese

Fluoride supports the formation of bones and teeth. It is primarily obtained through fluoridated drinking water and seafood or seaweed. A deficiency can lead to dental caries (cavities).

Finally, Manganese aids in bone formation and the activation of certain enzymes. It is found in greens, legumes, and grains. Deficiency may cause dizziness, menstrual disorders, or delayed wound healing.

Summary Table of Minerals

To help with your studies, here is a quick reference guide based on the key concepts discussed:

Study Note: When reviewing minerals, always link the source to the function. For example, knowing that Iron is in red meat helps you remember its role in blood (hemoglobin) formation.