21.The approximate percentage of water in pizza is which of these amounts?

a.5 percent

b.15 percent

c.30 percent

d.45 percent

22.Approximately how many millilitres of water/day are produced by a person’s metabolism?

a.100 mL

b.250 mL

c.500 mL

d.750 mL

23.Which of the following is present in highest concentration in soft water?

a.sodium

b.calcium

c.magnesium

d.phosphorus

24.Habitual intake of soft water is most likely to aggravate which of the following illnesses?

a.scurvy

b.diabetes

c.hypertension

d.megaloblastic anemia

25.Which of the following statements best describes the relationship between caffeine intake and water balance?

a.Caffeine inhibits water absorption from the GI tract.

b.Caffeine is known to act as a diuretic only when consumed as coffee or tea.

c.Regular intake of caffeine promotes an increase in water retention of the interstitial fluid volume.

d.Habitual consumers of caffeine lose almost no more fluid from the body than when ingesting non-caffeinated beverages.

26.Which of the following types of drinking water contains the lowest amount of minerals?

a.soft water

b.hard water

c.natural water

d.distilled water

27.What organ provides the major control for homeostasis of body fluids?

a.liver

b.heart

c.kidneys

d.skeletal muscle

28.How does antidiuretic hormone function?

a.by activating renin

b.by activating angiotensin

c.by stimulating water reabsorption by the kidneys

d.by stimulating sodium reabsorption by the kidneys

29.What pituitary hormone regulates kidney retention of water?

a.thyroxine

b.adrenocorticotrophic hormone

c.epinephrine

d.antidiuretic hormone

30.Which one of the following minerals is most predominant in hard water?

a.magnesium

b.potassium

c.iron

d.sodium