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.
Electrolytes are minerals that carry an electric charge. The body needs electrolytes to regulate nerve and muscle function, maintain acid-base balance and maintain fluid balance. Electrolytes such as chloride, potassium, sodium, magnesium and calcium can be lost through sweat and need to be replaced through the diet.