Nutrition Chpt 13
Under normal circumstances, what is the average percentage of dietary iron that is absorbed from a mixed diet?
18
Which of the following is a characteristic of iron nutrition?
Iron deficiency and iron overload share some of the same signs and symptoms
What percent of the total iron content of a normal diet is heme iron?
10
How much iron does a person donating a pint of blood lose?
2.5mg
What is the Tolerable Upper Intake Level for zinc for adults?
40mg
Which of the following is found in the first stage of iron deficiency?
Iron stores decline, as assessed by serum ferritin.
Iron overload is also known as
hemochromatosis.
What population group is at the highest risk for iron overload?
Adult men
Which of the following conditions is known to lead to copper deficiency?
Excess zinc
Which of the following represents the most reliable dietary source of zinc?
Meats and shellfish
Which of the following is a major binding protein for zinc?
Metallothionein
What is the name given to the ingestion of nonnutritive substances?
Pica
Which of the following foods provides the greatest amount of iron per serving?
Pinto beans
Zinc content is highest in foods that also contain a large amount of
Protein
Which of the following is a characteristic of the trace minerals?
The amounts in foods are dependent, in part, on soil composition
A measure of the rate at which a nutrient is absorbed and used by the body is termed
bioavailability
Which of the following is a characteristic of iron transport?
Transferrin in the blood carries iron to the bone marrow
Which of the following nutrients enhances iron absorption from the intestinal tract?
Vitamin C
What is the chief transport substance for zinc in the circulation?
Albumin
Which of the following compounds provides a major storage reservoir for iron?
Ferritin
Which of the following is known to enhance iron absorption?
Foods containing vitamin C
What mineral is critical to the synthesis of thyroxine?
Iodine
Why are people with iron overload at increased risk for infections?
Iron-rich blood favors growth of bacteria
Which of the following is a characteristic of iron utilization?
Most of the body's iron is recycled
Which of the following is a characteristic of iron deficiency?
People with anemia generally become fatigued only when they exert themselves
What is the major cause of iron deficiency?
Poor nutrition
What is the chief function of hemosiderin?
Stores excess body iron
Which of the following has been shown to improve absorption of iron from iron supplements?
Taking them on an empty stomach rather than with meals
What component of tea is responsible for its effect on iron absorption?
Tannic acid
What formulation of zinc has been found somewhat effective in treating the symptoms of the common cold?
Zinc gluconate
The most common cause of iron overload is
a genetic predisposition.
Goiter is caused primarily by a deficiency of
iodin
Which of the following foods provides iron in the most absorbable form?
Chicken
What is the oxygen-carrying protein of muscle cells?
Myoglobin