A double-blind experiment is one in which:
1.both the scientists and the subjects know who is receiving the treatment.
2.neither the scientists nor the subjects know who is receiving the treatment.
3.only the scientists know who is receiving the treatment.
4.only the human subjects committee and the scientists know who is receiving treatment.2
2
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What is the National Weight Control Registry?
A. a list of medical doctors specially trained in treating individuals with obesity B. a government agency that monitors fad diets for quackery C. recommendations from hundreds of registered dietitians suggesting ways to achieve a healthy body weight D. an ongoing project detailing the habits of people who have lost at least 30 pounds and maintained their weight for at least one year
Which of the following results when bilirubin accumulates in the bloodstream?
a. jaundice b. ascites c. hepatic coma d. mental disturbances
What percentage of people in the United States has at least one major risk factor for coronary heart disease by age 20?
a. 10 b. 20 c. 30 d. 40 e. 50
Which substance cannot be transported across the placenta?
A. water B. cholesterol C. oxygen D. ketones E. insulin