Molecules that are recognized by the immune system as potential pathogens are called:
a. antigens.
b. antibodies.
c. histamines.
d. microbes.
a
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Which of the heart chambers is the most muscular?
A. left atrium B. right atrium C. left ventricle D. right ventricle
All of the following factors undermine the efforts of the National School Lunch Program to serve nutritious foods at school except:
a. short lunch periods and long lines. b. the availability of salad bars. c. access to vending machines. d. the presence of fast-food restaurants.
Which of the following is not true?
a. Ingestion of a high-fat breakfast 1 hour before exercise increases plasma chylomicrons but does not affect fat oxidation. b. Ingestion of a high-fat breakfast increases plasma free fatty acid. c. Ingestion of a high-fat breakfast reduces gastric emptying compared with ingestion of a high-carbohydrate breakfast. d. Ingestion of a high-fat breakfast results in elevated plasma triglyceride levels 4 hours after ingestion. e. All statements are true.
RDAs are not used in food labeling because
A. they are age- and sex-specific. B. they are too generic. C. their values are set too high. D. there are too many of them.