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Homework answers / question archive / York University - KINE 4020 Chapter 14-Nutrients for Blood Health MULTIPLE CHOICE 1)Which of the following is a key nutrient in blood? water sugar fibre protein     Which of the following percentages makes up plasma in the blood? 40 45 50 55     Approximately how long does it take to circulate blood from the heart through the body and back to the heart? 1/2 a minute 1 minute 1 1/2 minutes 2 minutes     About how much iron is absorbed from a vegetarian diet compared with an omnivorous diet? the same one-half as much twice as much three times as much     Which of the following percentages makes up leukocytes in the blood? 1 percent 2 percent 3 percent 4 percent     What is prothrombin? a storage protein for vitamin K a transport protein for vitamin E a protein needed for bone formation a protein needed for blood clot formation     Which of the following is known to require vitamin K for its synthesis? albumin   GI mucosa prothrombin mucopolysaccharides     In what chief capacity does vitamin K function? blood clotting energy metabolism calcium utilization epithelial tissue renewal     Other than blood clotting, which of the following is a major function of vitamin K? It participates in synthesis of bone proteins

York University - KINE 4020 Chapter 14-Nutrients for Blood Health MULTIPLE CHOICE 1)Which of the following is a key nutrient in blood? water sugar fibre protein     Which of the following percentages makes up plasma in the blood? 40 45 50 55     Approximately how long does it take to circulate blood from the heart through the body and back to the heart? 1/2 a minute 1 minute 1 1/2 minutes 2 minutes     About how much iron is absorbed from a vegetarian diet compared with an omnivorous diet? the same one-half as much twice as much three times as much     Which of the following percentages makes up leukocytes in the blood? 1 percent 2 percent 3 percent 4 percent     What is prothrombin? a storage protein for vitamin K a transport protein for vitamin E a protein needed for bone formation a protein needed for blood clot formation     Which of the following is known to require vitamin K for its synthesis? albumin   GI mucosa prothrombin mucopolysaccharides     In what chief capacity does vitamin K function? blood clotting energy metabolism calcium utilization epithelial tissue renewal     Other than blood clotting, which of the following is a major function of vitamin K? It participates in synthesis of bone proteins

Health Science

York University - KINE 4020

Chapter 14-Nutrients for Blood Health

MULTIPLE CHOICE

1)Which of the following is a key nutrient in blood?

    1. water
    2. sugar
    3. fibre
    4. protein

 

 

  1. Which of the following percentages makes up plasma in the blood?
    1. 40
    2. 45
    3. 50
    4. 55

 

 

  1. Approximately how long does it take to circulate blood from the heart through the body and back to the heart?
    1. 1/2 a minute
    2. 1 minute
    3. 1 1/2 minutes
    4. 2 minutes

 

 

  1. About how much iron is absorbed from a vegetarian diet compared with an omnivorous diet?
    1. the same
    2. one-half as much
    3. twice as much
    4. three times as much

 

 

  1. Which of the following percentages makes up leukocytes in the blood?
    1. 1 percent
    2. 2 percent
    3. 3 percent
    4. 4 percent

 

 

  1. What is prothrombin?
    1. a storage protein for vitamin K
    2. a transport protein for vitamin E
    3. a protein needed for bone formation
    4. a protein needed for blood clot formation

 

 

  1. Which of the following is known to require vitamin K for its synthesis?
    1. albumin

 

    1. GI mucosa
    2. prothrombin
    3. mucopolysaccharides

 

 

  1. In what chief capacity does vitamin K function?
    1. blood clotting
    2. energy metabolism
    3. calcium utilization
    4. epithelial tissue renewal

 

 

  1. Other than blood clotting, which of the following is a major function of vitamin K?
    1. It participates in synthesis of bone proteins.
    2. It participates in blood circulation.
    3. It participates in oxygen transportation.
    4. It participates in thyroid regulation.

 

 

  1. Which of the following conditions occurs with a deficiency of vitamin K?
    1. GI distress
    2. Fatigue
    3. Hemorrhaging
    4. Liver damage

 

 

  1. Which of the following is another name for vitamin K?
    1. ergocalciferol
    2. hydroxyvitamin K
    3. menaquinone
    4. precursor K

 

 

  1. What is the approximate range for the absorption of vitamin K from foods?
    1. 10 - 40 percent
    2. 20 - 50 percent
    3. 30 - 60 percent
    4. 40 - 70 percent

 

 

  1. Which of the following vitamins is synthesized by intestinal bacteria?
    1. vitamin A
    2. vitamin E
    3. vitamin K
    4. vitamin D

 

 

  1. Approximately what percentage of the body’s store of vitamin K is derived from GI tract bacterial syn- thesis?

 

    1. Less than 5 percent
    2. 25 percent
    3. 50 percent
    4. 85 percent

 

 

  1. What is the adult male AI for vitamin K?
    1. 60 µg
    2. 120 µg
    3. 150 µg
    4. 180 µg

 

 

  1. Jennifer does not like leafy greens, which are a rich source of vitamin K. What other food provides an excellent source of vitamin K?
    1. fish
    2. vegetable oil
    3. potatoes
    4. bananas

 

 

  1. What is the ionic state of ferrous iron?
    1. -2
    2. -1

c.     +1

d.   +2

 

 

  1. What is the ionic state of ferric iron?
    1. -3
    2. -2

c.     +2

d.   +3

 

 

  1. What iron-containing compound carries oxygen in the bloodstream?
    1. ferritin
    2. myoglobin
    3. transferrin
    4. hemoglobin

 

 

  1. What is the oxygen-carrying protein of muscle cells?
    1. transferrin
    2. myoglobin
    3. hemoglobin
    4. cytochrome

 

 

  1. How many grams of iron would be found in the hemoglobin if a person’s body has a total of 5 g of iron?
    1. 1 g
    2. 2 g
    3. 3 g
    4. 4 g

 

 

  1. Where is myoglobin found in the body?
    1. brain cells
    2. stomach cells
    3. muscle cells
    4. liver cells

 

 

  1. Which of the following compounds provides a major storage reservoir for iron?
    1. ferritin
    2. myoglobin
    3. transferrin
    4. hemoglobin

 

 

  1. Which of the following statements illustrates the relationship between zinc and iron?
    1. Good food sources include dairy products.
    2. Proteins in the blood are needed for their transport.
    3. Severe deficiencies lead to delay in the onset of puberty.
    4. Doses of 10 times the RDA may cause death in children.

 

 

  1. Which of the following is a protein that carries iron through the circulation to the tissues?
    1. albumin
    2. transferrin
    3. hemosiderin
    4. metallothionein

 

 

  1. Which one of the following percentages represents how well heme iron is absorbed?
    1. 7 percent
    2. 10 percent
    3. 15 percent
    4. 25 percent

 

 

  1. How does vitamin C enhance iron absorption when consumed in the same meal?
    1. It activates transferrin.
    2. It keeps iron in the reduced ferrous form.
    3. It releases iron from the proteins in the stomach.
    4. It complexes with iron and promotes mucosal transport.

 

 

  1. 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

 

 

  1. What percentage of the iron in a hamburger is non-heme iron?
    1. 0 percent
    2. 20 percent
    3. 40 percent
    4. 60 percent

 

 

  1. Which of the following foods provides iron in the most absorbable form?
    1. rice
    2. spinach
    3. chicken
    4. orange juice

 

 

  1. Which of the following types of cells control iron absorption?
    1. pancreatic cells
    2. intestinal cells
    3. liver cells
    4. lymph cells

 

 

  1. Your cousin Emily is a vegetarian. Since you have just learned in your nutrition class that non-heme iron is absorbed less efficiently than heme iron, you want to make sure Emily is getting enough iron. What should you recommend Emily do to maximize her iron absorption?
    1. Choose spinach as her main source of iron
    2. Eat her non-heme iron sources with a glass of milk
    3. Eat her non-heme iron sources with a glass of orange juice
    4. Refrain from any major activity after eating to aid digestion/absorption of iron

 

 

  1. Which of the following foods contains the MFP factor?
    1. cheese
    2. spinach
    3. soybeans
    4. chicken leg

 

 

  1. What is the function of MFP factor?
    1. It enhances iron absorption.
    2. It acts as an iron enrichment nutrient.
    3. It simulates metallothionein synthesis.
    4. It acts as chelating agent for iron toxicity treatment.

 

 

 

  1. When calculating the amount of iron that can be absorbed from a meal, which of the following factors are of major importance?
    1. protein content
    2. oxalate content
    3. vitamin A content
    4. MFP factor content

 

 

  1. Which of the following nutrients enhances iron absorption from the intestinal tract?
    1. biotin
    2. calcium
    3. vitamin D
    4. vitamin C

 

 

  1. Which of the following improves absorption of iron from supplements when taken with them?
    1. tea
    2. meat
    3. milk
    4. whole-grain bread

 

 

  1. Which of the following is known to enhance iron absorption?
    1. tea
    2. coffee
    3. foods containing vitamin C
    4. foods containing vitamin E

 

 

  1. Which of the following is known to reduce the absorption of iron?
    1. shrimp
    2. coffee
    3. sugars
    4. cheese

 

 

  1. Which of the following foods is likely to result in iron deficiency in children if overemphasized in the diet?
    1. milk
    2. cereals
    3. vegetables
    4. dried beans

 

 

  1. Which of the following would be an iron-rich meal?
    1. beef and tomato chili
    2. grilled cheese sandwich

 

    1. red beans and rice
    2. peanut butter sandwich

 

 

  1. Which one of the following are chief storage sites for surplus iron?
    1. pancreas
    2. spleen
    3. muscle
    4. appendix

 

 

  1. Which of the following processes occur when iron is transported in the body?
    1. Albumin is the major iron transport protein in the blood.
    2. Transferrin in the blood carries iron to the bone marrow.
    3. Hemochromatosis results from inability to absorb and transport iron.
    4. Ferritin functions by transporting iron from the spleen to the bone marrow.

 

 

  1. During the iron recycling process, which of the following introduces iron into the hemoglobin of red blood cells?
    1. glucose
    2. insulin
    3. bone marrow
    4. gastric juices

 

 

  1. Which one of the following is a method by which small amounts of iron are lost from the body?
    1. digestion
    2. bleeding
    3. feces
    4. urine

 

 

  1. What is the name of the hormone produced by the liver that regulates iron balance?
    1. hepatic hormone
    2. homosiderin
    3. heparin
    4. hepcidin

 

 

  1. Free iron can cause damage to which one of the following types of cells?
    1. white blood cells
    2. lipid cells
    3. brain cells
    4. nerve cells

 

 

  1. Which of the following percentages of North American toddlers, adolescent girls, and women of child- bearing age suffer from iron-deficiency anemia?

 

a.    10 percent

b. 12 percent

c.     14 percent

d. 16 percent

 

 

  1. Which of the following is known as an iron-overload protein?
    1. transferrin
    2. hemosiderin
    3. marrow ferritin
    4. metallothionein

 

 

  1. How does a person respond to high blood levels of hepcidin??
    1. by decreasing iron absorption
    2. by increasing iron absorption
    3. by decreasing zinc absorption
    4. by increasing zinc absorption

 

 

  1. Which of the following describes hepcidin?
    1. a factor in meats that enhances iron absorption
    2. an intestinal mucosa protein that assists in iron turnover
    3. a substance in legumes that interferes with iron absorption
    4. a liver-derived hormone that helps regulate iron absorption and transport

 

 

  1. Which one of the following numbers indicates a typical woman's total monthly blood loss?
    1. 0.5 mg
    2. 1.0 mg
    3. 1.5 mg
    4. 2 mg

 

 

  1. What is the average lifespan of red blood cells?
    1. .2 weeks
    2. 1 month
    3. 4 months
    4. 6 months

 

 

  1. Approximately how many people worldwide are thought to be affected by iron-deficiency anemia?
    1. 1 million
    2. 100 million
    3. 1.6 billion
    4. 3.5 billion

 

 

  1. What is the chief function of hemosiderin?

 

    1. storage of excess body iron
    2. inhibition of hemoglobin synthesis
    3. enhancement of heme iron absorption
    4. enhancement of non-heme iron absorption

 

 

  1. Approximately how much iron is lost daily by adults from urine, sweat, and shed skin?
    1. 1 mg
    2. 5 mg
    3. 12 mg
    4. 18 mg

 

 

  1. What is the major cause of iron deficiency?
    1. blood loss
    2. poor nutrition
    3. hereditary defect
    4. parasitic infections of the GI tract

 

 

  1. Which of the following numbers indicates the number of stages to iron deficiency?
    1. 2
    2. 3
    3. 4
    4. 5

 

 

  1. Which of the following population groups is least susceptible to iron-deficiency anemia?
    1. older infants
    2. children 2–10 years of age
    3. women of childbearing age
    4. men 20–45 years of age

 

 

  1. Which of the following is found in the first stage of iron deficiency?
    1. Iron stores decline, as assessed by serum ferritin.
    2. Hemoglobin levels fall, as assessed by complete blood count.
    3. Red blood cell count falls, as assessed by hematocrit count.
    4. Hemoglobin synthesis declines, as assessed by erythrocyte protoporphyrin.

 

 

  1. Which of the following represents the order of the stages of iron deficiency?
    1. Iron stores decline, iron transport diminishes, hemoglobin synthesis falls.
    2. Hemoglobin synthesis falls, iron transport diminishes, iron stores decline.
    3. Iron transport diminishes, hemoglobin synthesis falls, iron stores decline.
    4. Iron transport diminishes, iron stores decline, and hemoglobin synthesis falls.

 

 

  1. Taking into account the efficiency of intestinal absorption of iron, approximately how much dietary iron must be consumed to account for the iron lost by donating a pint of blood?
    1. 5 mg
    2. 15 mg
    3. 50 mg
    4. 100 mg

 

 

  1. Which of the following individuals would most likely NOT need an iron supplement?
    1. 2-year-old
    2. elderly female
    3. elderly male
    4. middle-aged male

 

 

  1. Which of the following best describes erythrocyte protoporphyrin?
    1. iron chelating drug
    2. hemoglobin precursor
    3. indicator of iron toxicity
    4. inherited iron-deficiency supplement

 

 

  1. Which of the following abnormalities can be indicated by the erythrocyte protoporphyrin level?
    1. late iron toxicity
    2. early iron toxicity
    3. late iron deficiency
    4. early iron deficiency

 

 

  1. The most common test to diagnose iron deficiency is called which of the following measures?
    1. size of red blood cells
    2. number of red blood cells
    3. DNA content of red blood cells
    4. hemoglobin content of red blood cells

 

 

  1. What type of anemia results from iron deficiency?
    1. hemolytic
    2. megaloblastic
    3. microcytic hypochromic
    4. macrocytic hyperchromic

 

 

  1. Which one of the following metals is most likely deficient when blood hemoglobin level is low?
    1. zinc
    2. iron
    3. copper
    4. manganese

 

 

  1. Which of the following symptoms would be found in individuals with iron-deficiency anemia?
    1. increased sweating
    2. headaches
    3. skin rashes
    4. irritability

 

 

  1. Why are hemoglobin and hematocrit tests of limited usefulness in the assessment of iron status?
    1. They are expensive to perform.
    2. They can be inaccurate.
    3. They are late indicators of iron deficiency.
    4. The range of normal value is usually wide.

 

 

  1. Joe has decided to donate blood. How much iron will he lose if he donates 2 pints (1000 mL) of blood in a year?
    1. 1 mg
    2. 2.5 mg
    3. 5 mg
    4. 10 mg

 

 

  1. Which of the following is a characteristic of blood cells in someone who has iron-deficiency anemia?
    1. blood cells are large
    2. blood cells are a triangular shape
    3. blood cells are small
    4. blood cells are a moon shape

 

 

  1. Which of the following is descriptive of iron deficiency and behaviour?
    1. The practice of pica may enhance iron absorption.
    2. Changes in behaviour precede the appearance of anemia.
    3. The practice of pica may delay the onset of iron-induced behavioural changes.
    4. Adults are more resistant to iron-induced behavioural changes than children.

 

  1. Which of the following conditions is also known as iron overload?
    1. ferro cyanosis
    2. hemoglobinemia
    3. hemochromatosis
    4. hyperhemoglobin status

 

 

  1. What is the name given to the ingestion of non-food substances?
    1. pica
    2. goiter
    3. tetany
    4. hemosiderosis

 

 

 

  1. What is the most common cause of iron overload?
    1. an injury to the GI tract
    2. a genetic predisposition
    3. excessive use of iron cookware
    4. excessive use of iron supplements

 

 

  1. Which of the following is a cause of hemochromatosis?
    1. herbal supplements
    2. excess blood loss
    3. repeated blood transfusions
    4. chronic liver disease

 

 

  1. Which of the following foods should be especially limited in the diet of individuals with hemochro- matosis?
    1. dairy products
    2. fluoridated water
    3. iron-fortified cereals
    4. carbonated beverages

 

 

  1. Which of the following is a sign of iron toxicity?
    1. apathy
    2. stomach ulcer
    3. hypochromic anemia
    4. pallor

 

 

  1. Why are people with iron overload at increased risk for infections?
    1. Excess tissue iron destroys vitamin C.
    2. Iron-rich blood favours growth of bacteria.
    3. Iron-rich blood impairs the immune system.
    4. Excess tissue iron interferes with antibiotic function.

 

 

  1. Jasmine suffers from hemosiderosis. To which area in her body does the hemosiderin deposit itself?
    1. pancreas
    2. kidneys
    3. gallbladder
    4. liver

 

 

  1. Which of the following disorders may be linked with the presence of high blood iron?
    1. dermatitis
    2. diverticulosis
    3. heart disease
    4. neural tube defects

 

 

 

  1. Which of the following describes one aspect of iron toxicity?
    1. Among men in Canada, it is twice as common as iron-deficiency anemi
    2. In adults, the consumption of alcohol is somewhat protective against absorption of excess iron.
    3. In most people with this disorder, infections are rare because bacteria are killed by excess iron in the blood.
    4. It is usually caused by a virus that attacks the intestinal mucosal cells, leading to unregu- lated and excessive iron absorption.

 

 

  1. What population group is at the highest risk for iron overload?
    1. adult men
    2. adult women
    3. pregnant women
    4. adolescents

 

 

  1. For every 10 adult males with iron deficiency, how many adult males have iron overload?
    1. 5
    2. 10
    3. 20
    4. 40

 

 

  1. Approximately how much iron would be provided by a balanced diet supplying 2000 kcalories?
    1. 3 mg
    2. 6 mg
    3. 12 mg
    4. 30 mg

 

 

  1. What is the Tolerable Upper Intake Level for iron?
    1. 45 mg
    2. 90 mg
    3. 120 mg
    4. Twice the RDA

 

 

  1. What percent of the RDA for iron is consumed by the typical woman?
    1. 33 percent
    2. 67 percent
    3. 100 percent
    4. 130 percent

 

 

  1. When eaten in the same meal, which of the following foods enhances the absorption of iron in legumes?

 

    1. nuts
    2. milk
    3. oranges
    4. whole-grain breads

 

 

  1. Approximately how much higher is the RDA for iron for a vegetarian woman of childbearing age com- pared with her nonvegetarian counterpart?
    1. 33 percent
    2. 80 percent
    3. 150 percent
    4. 200 percent

 

 

  1. Which of the following is an iron-rich breakfast for a vegetarian?
    1. leavened bread with strawberry jam and rice milk
    2. unleavened bread with apricot jam and rice milk
    3. cream of wheat and orange juice
    4. oatmeal with blackstrap molasses and apple juice

 

 

  1. Increasing the consumption of which of the following foods would most likely benefit a child dia- gnosed with iron-deficiency anemia?
    1. milk
    2. red meat
    3. fresh fruits
    4. yellow vegetables

 

 

  1. In Canada, iron is currently added to which of the following foods?
    1. milk and cheese
    2. breads and cereals
    3. peanut butter and jellies
    4. orange juice and tomato juice

 

 

  1. A normal, healthy young adult woman loses an average of 2 mg/day of iron from the body. Approxim- ately what minimum amount should she consume from the diet to prevent negative iron balance?
    1. 2 mg/day
    2. 5 mg/day
    3. 11 mg/day
    4. 19 mg/day

 

 

  1. Which of the following is the most effective and least costly strategy for preventing an iron deficiency?
    1. Consume iron supplements at a level 2–3 times the RDA.
    2. Switch to iron cooking utensils and eat 4 servings of red meat daily.
    3. Eat small amounts of citrus products and increase intake of low-fat milk.
    4. Eat small quantities of meat, fish, and poultry frequently together with liberal amounts of

 

vegetables and legumes.

 

 

  1. Which of the following foods provides the greatest amount of iron per serving?
    1. broccoli
    2. skim milk
    3. clams
    4. cheddar cheese

 

 

  1. Which of the following would represent a source of possible iron contamination?
    1. an iron frying pan
    2. an iron chelate
    3. a ferric iron supplement
    4. a ferrous iron supplement

 

 

  1. Which of the following is a common example of iron contamination in the diet?
    1. Using an iron skillet to scramble eggs can triple their iron content.
    2. Cooking acidic foods in a copper pot can extract chelate iron from the pot.
    3. Simmering acidic foods in glass dishes leads to leaching of iron salts from the glass.
    4. Cooking leafy vegetables in a galvanized pot leads to a 6-fold increase in iron content.

 

 

  1. Which of the following has been shown to improve absorption of iron from iron supplements?
    1. taking them with milk
    2. taking them with orange juice
    3. taking them on an empty stomach rather than with meals
    4. taking them in the form of the ferric salt rather than the ferrous salt

ANS: C

 

  1. Why is taking vitamin C ineffective at enhancing iron absorption from standard iron supplements?
    1. The iron in the supplement is in a chelated form.
    2. The iron in the supplement is already in the ferrous form.
    3. The iron in the supplement binds irreversibly with vitamin C.
    4. The iron supplement already contains MFP to enhance absorption.

 

 

 

 

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