Exam 2: Evaluating Nutrition Information

A team of scientists extracts a chemical that they call "Zombia" from the leaves of a common houseplant.One of the scientists would like to market Zombia as a dietary supplement because it makes people sleepy,when it is injected into them.Based on this information,Zombia

Researchers are conducting a study to determine the effects of vitamin D supplements on the adult human immune system.The study involves providing pills that contain vitamin D to one group of human adults and pills that do not contain the vitamin or other active ingredients to another group of adults.The pills that do not contain vitamin D are

Scientists in a Central American country are studying factors that may be associated with delayed physical growth among a group of low-income children.The children live in a region of the nation that has high levels of lead in drinking water.This study is an example of a(an)____ study.

A nutrition researcher adds 30 mg of the mineral iron to the daily diet of 50 4-week-old laboratory mice.After ten weeks,the scientist takes blood samples from each mouse.According to his findings,the mice developed abnormal levels of certain enzymes in their red blood cells.Based on this information and your knowledge of scientific research,what would you tell him?

Researchers are conducting a study to determine the effects of zinc supplements on the human immune system.The study involves providing pills that contain zinc to one group of human subjects and pills that do not contain zinc or other active ingredients to another group of people.The pills that do not contain zinc are

Which of the following observations is an example of a positive correlation?

A researcher wants to identify lifestyle factors that increase the risk of stomach cancer in men.His study design involves enrolling 250 adult men who have stomach cancer and 250 men who are cancer-free but have similar characteristics and backgrounds as the men who have stomach cancer.The researcher collects and analyzes information about each participant's lifestyle.Based on this information,what kind of study is the researcher conducting?

The ____ is responsible for ensuring the safety and effectiveness of medications.

A nutrition researcher would like to determine whether women who take fish oil supplements during pregnancy give birth to babies who score higher on basic intelligence tests when they are 5 years of age than the 5-year old children that were born to women who did not take the fish oil supplements during pregnancy.This kind of research is a _____ study.

Which of the following statements is true?

Which of the following observations is an example of an inverse correlation?

A medical researcher reads an article in "Today's Health-Conscious Woman" magazine about the benefits of using the phytochemical capsaicin to treat knee pain.She asks 10 people with arthritic knees to rub a cream that contains the phytochemical on their knee joints for two weeks.At the end of the two weeks,the researcher asks the subjects whether their knee pain improved,stayed about the same,or worsened during the treatment period.After collecting responses from the people,the researcher reports the results of her study during a popular TV show that is hosted by a doctor.Based on this information,which of the following statements is true?

A popular fitness magazine has an article about the health benefits of high-fiber diets.If the article's author has the credentials _____ after his or her name,the article is likely to be a reliable source of nutrition information.

A popular women's magazine has an article about the health benefits of consuming calcium-rich foods.If the article's author has the credentials _____ after his or her name,the article is likely to be a reliable source of nutrition information.

Which of the following statements is true?

A magazine article about weight loss diets includes false information about the process of digestion that uses scientific-sounding terms to make it seem factual.The faulty information is an example of

Which of the following practices is an example of complementary and alternative medicine (CAM)?

Having a control group enables researchers to

Which of the following statements is true?

A group of researchers wants to determine whether certain dietary factors are associated with the risk of attention deficit hyperactivity disorder (ADHD).The scientists follow a group of 500 healthy newborn babies for 10 years and collect health information as well as dietary practices for each child.At the end of the study period,the scientists analyze the data for correlations between the children's dietary practices and their likelihood of being diagnosed with ADHD.This is an example of a _____ study.