問題一覧
1
Coenzymes play an important role in metabolism because they
aid in the function of activating enzymes.
2
Select all that apply B vitamins are required for
chemical breakdown of carbohydrates., synthesis of lipids., metabolism of amino acids.
3
In North America, intake of B vitamins generally
meets or exceeds recommendations.
4
Nutrients are lost during refinement of grains because
the germ, bran, and husk are discarded.
5
The thiamin coenzyme is particularly important for the release of energy from
carbohydrates.
6
A compound that combines with an inactive enzyme to form an active enzyme is called a(n)
coenzyme.
7
The coenzyme forms of ______ are integral to the metabolism of carbohydrates, lipids, and protein for energy.
B vitamins
8
Select all that apply Typical North American B vitamin status is good because:
sources of B-vitamins are widespread in the food supply., many foods are fortified with B vitamins.
9
Beriberi is a deficiency disease caused by a lack of
thiamin.
10
Select all that apply Compared to refined or processed grains, whole grains contain
more vitamin E., more fiber., more magnesium.
11
Select all that apply Which two food groups supply the most thiamin in the typical American diet?
Protein foods, Grains
12
The B vitamin required as a coenzyme to release energy from carbohydrates and some amino acids is
thiamin.
13
Which of the following B-vitamins plays a role in the body's antioxidant defense system as a coenzyme for glutathione peroxidase?
Riboflavin
14
A riboflavin deficiency usually occurs with a deficiency of several other B vitamins because
these nutrients often occur in the same foods.
15
Cow's milk is an excellent source of
riboflavin.
16
A person experiencing weakness, loss of appetite, poor coordination, and edema caused from lack of thiamin is experiencing the deficiency disease known as
beriberi.
17
The coenzyme forms of ______ are involved in breakdown and synthesis of fat and protein.
niacin
18
Select all that apply Identify three food sources of thiamin.
Enriched flour, Whole grains, Pork
19
Select all that apply Which of the following are characteristics of pellagra, the deficiency disease for niacin?
dementia., diarrhea., dermatitis.
20
Select all that apply Functions of riboflavin include
assisting antioxidant reactions., release of energy from fatty acids.
21
Riboflavin deficiency is usually accompanied by deficiencies of several other B vitamins.
True
22
The human body can synthesize niacin from an amino acid: _________ mg of tryptophan can be converted into about 1 mg of niacin.
60
23
Select all that apply Food sources of riboflavin include
eggs., enriched grains., milk.
24
Niacin is
a coenzyme in metabolic reactions that yield energy from food.
25
Select all that apply High intakes of nicotinic acid can lead to
facial flushing., headache., itching.
26
Dementia, diarrhea, dermatitis, and death are symptoms of the deficiency disease known as
pellagra.
27
Which of the following B-vitamins functions in the release of energy from carbohydrates, lipids, and proteins as well as in fatty acid synthesis? Its name comes from the Greek word meaning "from every side."
pantothenic acid
28
Select all that apply Choose the true statements about pantothenic acid deficiency.
A pantothenic acid deficiency may be unrecognizable., Symptoms would be hidden among deficiencies of thiamin, riboflavin, vitamin B-6, and folate., Might occur in alcoholism along with a nutrient-deficient diet.
29
Select all that apply The body's needs for niacin are met by
synthesis from tryptophan., food sources.
30
The Adequate Intake for pantothenic acid for adults is ______ for adult men and women.
5 milligrams per day
31
Select all that apply Megadoses of niacin are sometimes used to lower blood lipids in patients with cardiovascular disease. A risk of chronically exceeding the UL for niacin is damage to the
GI tract., liver.
32
The coenzyme form of ______ participates in more than 100 amino acid metabolism reactions, including homocysteine metabolism.
vitamin B-6
33
Select all that apply The coenzyme form of pantothenic acid participates in
release of energy from carbohydrates, fats, and proteins., fatty acid synthesis.
34
Because it is necessary for over 100 reactions in amino acid metabolism, a deficiency of ______ leads to widespread symptoms, including depression, skin disorders, and nerve problems.
vitamin B-6
35
Select all that apply A deficiency of pantothenic acid may occur in
an alcoholic., a nutrient-deficient diet.
36
The average intake of pantothenic acid of North Americans is ______ the AI.
greater than
37
Although the vitamin B-6 requirements of ______ are somewhat higher than the RDA, their needs are typically met by the diet.
athletes
38
A B-vitamin that functions in the addition of carbon dioxide to other compounds during metabolism of glucose, fatty acids, and amino acids is ______.
biotin
39
Select all that apply The functions of vitamin B-6 include
homocysteine metabolism., synthesis of nonessential amino acids., synthesis of neurotransmitters.
40
Select all that apply Which of the following body systems are affected by vitamin B-6 deficiency?
Nervous, Cardiovascular, Immune
41
Select all that apply Possible symptoms of biotin deficiency include ______.
nausea and vomiting, skin inflammation, muscle pain and weakness
42
An athlete uses more vitamin B-6 than a sedentary person.
True
43
Biotin deficiency is rare even when the dietary intake is low because biotin can be
synthesized by intestinal bacteria.
44
The coenzyme form of biotin functions to add ______ to compounds in metabolic reactions.
carbon dioxide
45
Which of the following can bind to biotin and inhibit its absorption?
Avidin
46
The thyroid gland uses ______ to synthesize thyroid hormones.
iodine
47
A person with iodine deficiency may experience
decreased thyroid function.
48
The deficiency disease that causes scaly, inflamed skin, decreased appetite, nausea, vomiting, and weakness is due to a lack of which B-vitamin?
Biotin
49
Biotin can be synthesized by bacteria that live in the human gastrointestinal tract.
True
50
Select all that apply Which of the following are rich sources of iodine?
Dairy products, Seafood and seaweed
51
The protein called avidin in raw egg whites inhibits the absorption of
biotin.
52
Which of the following is a function of chromium?
Glucose uptake
53
Select the primary function of iodine.
Thyroid hormone synthesis
54
Chromium deficiency may lead to
hyperglycemia.
55
As a result of a chronically inadequate iodine intake, an adult may develop
a goiter.
56
Many food composition databases lack information regarding ______ content of foods.
chromium
57
What is the best food source for iodine?
Iodized salt, 1/2 tsp
58
Select all that apply The functions of manganese include
free-radical metabolism., bone formation., energy metabolism.
59
Glucose intolerance may be a sign of ______ deficiency.
chromium
60
The main function of molybdenum is
as a part of several human enzymes.
61
Elevated levels of blood glucose, triglycerides, and cholesterol are clinical features of ______ deficiency.
chromium
62
Phosphatidylcholine is a phospholipid that primarily functions in
cell membrane structure.
63
Select all that apply Which of the following are dietary sources of chromium?
Organ meats, Beer, Nuts
64
Choline is a precursor for ______, which transfers single-carbon groups in metabolic reactions.
betaine
65
______ is the choline-containing compound that helps to insulate nerve cells.
Sphingomyelin
66
Which of the following minerals participates in bone formation, antioxidant reactions, and metabolism of glucose and amino acids?
Manganese
67
Molybdenum participates in
amino acid metabolism.
68
Choline is involved in the transport of ______ through the blood.
lipids
69
Choline plays a role in synthesis of which of the following components of the cell membrane?
Phospholipids
70
Protein foods are rich in choline.
true
71
Select all that apply Choline's role in transfer of single-carbon groups during metabolic reactions influences risk for
cardiovascular disease., birth defects.
72
______ is the choline-containing compound that functions as a neurotransmitter.
Acetylcholine
73
Select all that apply Choline deficiency could lead to
abnormal blood lipids., fatty liver.
74
The most nutrient-dense food source of choline is
eggs.