Nutrition Chpt 13

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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


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