The three different forms of vitamin A that are active in the body are ____________________.
Fill in the blank with correct word
Q. 2Approximately what percentage of the body's store of vitamin K is derived from GI tract bacterial synthesis?
a. Less than 5
b. 25
c. 50
d. 85
e. 95
Q. 3Substances that promote oxidation are usually termed
a. prooxidants.
b. antioxidants.
c. free radical generators.
d. reactive electron oxidants.
e. oxidative facilitators.
Q. 4Which of the following is a major form of vitamin K in foods?
a. Ergodione
b. Ergoquinone
c. Tocopherone
d. Phylloquinone
e. Ergotamine
Q. 5Which of the following is a characteristic of free radicals?
a. They are destroyed by cigarette smoking.
b. They arise from normal metabolic reactions.
c. They typically stop chain reactions associated with the production of peroxides.
d. They are known to accumulate even in the presence of abundant antioxidant nutrients.
e. They are more common in infants and children than adults and the elderly.
Q. 6Which of the following is a feature of vitamin K?
a. Deficiencies lead to intravascular clotting.
b. Major dietary sources are whole grains and legumes.
c. No adverse effects have been reported with high intakes.
d. Primary deficiencies are more common than secondary deficiencies.
e. Dietary vitamin K comes mostly from orange vegetables.
Q. 7What population group has the highest risk for vitamin K deficiency?
a. Young adults
b. Elderly
c. Newborns
d. Teenagers
e. Middle-aged adults
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