21.How many grams of iron would be found in the hemoglobin if a person’s body has a total of 5 g of iron?

a.1 g

b.2 g

c.3 g

d.4 g

22.Where is myoglobin found in the body?

a.brain cells

b.stomach cells

c.muscle cells

d.liver cells

23.Which of the following compounds provides a major storage reservoir for iron?

a.ferritin

b.myoglobin

c.transferrin

d.hemoglobin

24.Which of the following statements illustrates the relationship between zinc and iron?

a.Good food sources include dairy products.

b.Proteins in the blood are needed for their transport.

c.Severe deficiencies lead to delay in the onset of puberty.

d.Doses of 10 times the RDA may cause death in children.

25.Which of the following is a protein that carries iron through the circulation to the tissues?

a.albumin

b.transferrin

c.hemosiderin

d.metallothionein

26.Which one of the following percentages represents how well heme iron is absorbed?

a.7 percent

b.10 percent

c.15 percent

d.25 percent

27.How does vitamin C enhance iron absorption when consumed in the same meal?

a.It activates transferrin.

b.It keeps iron in the reduced ferrous form.

c.It releases iron from the proteins in the stomach.

d.It complexes with iron and promotes mucosal transport.

28.What fraction of the total iron content of a normal diet is heme iron?

a.1/100

b.1/10

c.1/3

d.1/2

29.What percentage of the iron in a hamburger is non-heme iron?

a.0 percent

b.20 percent

c.40 percent

d.60 percent

30.Which of the following foods provides iron in the most absorbable form?

a.rice

b.spinach

c.chicken

d.orange juice