Some of the most convincing evidence of the robust relationship between environmental factors and cancer comes from studies of cancer rates in _____
a. people migrating to other countries
b. older adults
c. certain ethnic groups
d. children
e. families
a
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Which of the following statements about carbohydrate loading is false?
A) Carbohydrate loading makes some athletes feel stiff and heavy. B) Carbohydrate loading is not useful if the event lasts less than an hour or two. C) Carbohydrate loading is effective for high-intensity, short-duration events such as sprinting and jumping events. D) Carbohydrate loading calls for 60-70% of calories to be from carbohydrates.
An estimated _____% of persons in the United States who have HIV are unaware they have been infected
a. 5 b. 10 c. 15 d. 21
A similar type of anemia is produced when there is a deficiency of either
a. iron and zinc b. vitamin B12 or folate c. vitamin B6 or vitamin B12 d. vitamin K or vitamin C
Strict vegetarians are at risk of developing a vitamin B12 deficiency because ____
a. specific foods in their diet inhibit the absorption of vitamin B12 b. their diet causes increased excretion of the vitamin c. only animal foods contain sufficient amounts of the vitamin d. their diet increases the rate of use of the vitamin by their bodies e. vitamin B12 is unavailable in fortified foods