The main reason why the Supreme Court case Marbury v. Madison was significant is because B. it established the power of judicial review, since this allows the Supreme Court to check the legislature. This question is archived.
Water: Why We Need It. Hydration is important because the body is comprised mostly of water, and the proper balance between water and electrolytes in our bodies really determines how most of our systems function, including nerves and muscles, says Larry Kenney, PhD, a professor of physiology and kinesiology at Penn State.
Muscle Cramps and Spasms: The Electrolyte Misconnection. Muscles need sufficient electrolytes--sodium, magnesium, potassium and chlorideâin proper balance to function properly. The body manipulates the balance of these minerals inside and outside of muscle cells in order to get the muscles to contract and relax.