1. How much of the adult human body is composed of water?
A. 10-20%
B. 30-40%
C. 50-60%
D. 80-90%
2. How many liters of water does the European Food Safety Authority recommend daily for men?
A. 1
B. 1.5
C. 2
D. 2.5
3. Which of these urinary hydration biomarkers provides the best index of day to day hydration?
A. Urine color
B. Urine concentration
C. Plasma osmolality
D. Plasma volume
4. What hormone is primarily responsible for water reabsorption at the level of the kidney?
A. Renin
B. Angiotensin
C. Aldosterone
D. Arginine vasopressin
5. A diuretic effect has been observed when caffeine consumption exceeds how many milligrams per kilogram of body weight?
A. 2
B. 3
C. 4
D. 6