Which of the following is a feature of kefir?
a. Its low pH inactivates lactose.
b. It contains live bacterial organisms.
c. It contains half as much lactose as milk.
d. It is a recommended substitute for people with milk allergy.
e. It is particularly difficult for people who are lactose intolerant to digest.
ANS: B
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A scientist adds 5 mcg of the mineral cadmium to the daily diet of 100 4-week-old laboratory mice. After twelve weeks, the researcher weighs and takes blood samples from each mouse. According to her findings, the mice lost weight during the 12-week period and they have abnormal levels of certain hormones in their blood. Based on this information and your knowledge of scientific research, what would you tell the researcher about her findings?
A. The findings need to be summarized in a research article for submission to a peer-reviewed nutrition journal. B. She needs to conduct more tests on the animals' blood, because her findings are incomplete. C. The findings are not meaningful or valid because of the way she designed her study. D. Her results are very interesting and she should report her findings to nutrition scientists, so they can repeat her study and confirm the results.
The primary role of fluoride is ____
A) to act as an antioxidant B) to help regulate the thyroid gland C) to help form tooth enamel D) to regulate energy production E) to help with iron utilization
When an athlete is hypohydrated, ____
A) core temperature during exercise is lower than when euhydrated B) blood volume is lower than when euhydrated C) endurance exercise performance is higher than when euhydrated D) the amount of water present easily meets the amount required for physiological functions