In cell cultures, abnormal prions
a. "hijack" DNA in order to produce more abnormal prions
b. convert normal prions into the abnormal form.
c. increase calcium influx, which triggers apoptosis.
d. enhance the expression of death genes that produce caspases.
b
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If a test has been standardized, which of these is true?
a. Researchers have included an equal mix of easy, intermediate, and difficult items. b. Scores on the test correlate significantly with performance on an important task. c. People's scores on the test are consistent from one test session to another. d. Rules have been established for interpreting scores on the test.
Infants who are socially deprived over a long time period can easily recover from any negative effects of this deprivation once they are given attention
a. True b. False Indicate whether the statement is true or false
Behavioral dieting includes all of the following EXCEPT
a. exercise. b. "yo-yo dieting.". c. keeping a "diet diary.". d. counting calories.
Dr. Little is interested in studying the effects of a new medication on children with asthma between the ages of six and 12 . She gets permission to try the medication on asthma patients in several hospital clinics. In this example, the sample includes children
a. of all ages with asthma. b. with asthma between the ages of six and 12. c. with asthma ages six and 12 from the clinics where Dr. Little does her study. d. with asthma of all ages who do not receive medication.