Final answer:
When a dehydrated human patient needs intravenous fluids, normal saline is commonly used to restore fluid balance and electrolyte levels.
Step-by-step explanation:
When a dehydrated human patient needs to be given fluids intravenously, the most common solution used is normal saline, which is a solution of sodium chloride (salt) in water. This solution helps to restore the body's fluid balance and electrolyte levels. Normal saline is isotonic, meaning that it has the same concentration of dissolved particles as the body's cells, making it compatible with the body's fluids.