Question1. Why does chemical content of urine changes throughout the day?

Question2. Will a person suffering from dehydration have urine with high or low specific gravity? What will happen to specific gravity when a person drinks large amount of water?

Question3. A blood sample contains albumin, chloride, glucose, and phosphate molecules, while a normal urine sample contains only chloride, and phosphate molecules. What does this tell you about one of the functions of the kidneys?

Question4. The presence of blood and/or casts in the urine can indicate a serious kidney problem. why are the kidney problems so serious?