HOSA 2025 Nutrition Assessment Practice Test - Complete Exam Prep

Magnesium plays a critical role in the contraction and relaxation of muscles. It assists in the functioning of muscle fibers by being a cofactor for enzymes involved in the synthesis of ATP, the energy currency of the cell. This is essential for muscle contractions as ATP is required for both the contraction and subsequent relaxation phases of muscle activity.

When muscles contract, calcium ions enter the muscle cells, and magnesium helps to regulate this process by competing with calcium. Adequate levels of magnesium ensure that calcium can be removed effectively from the muscle cells after contraction, allowing the muscles to relax. This balance between calcium and magnesium is vital for proper muscle function and preventing cramps or spasms.

In summary, magnesium's involvement in muscle contraction and relaxation is crucial for overall muscular activity, enabling both movement and muscle recovery.