Researchers are conducting a study to determine the effects of vitamin C on the human immune system. The study involves providing pills that contain vitamin C to one group of human subjects and pills that do not contain vitamin C or other active ingredients to another group of people. The pills that do not contain the vitamin are
A. supplements.
B. placebos.
C. antidotes.
D. treatments.
Answer: B
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How is the determination of the physical activity level (PAL) categories beyond sedentary different from the sedentary category?
a. They are based on METs. b. They are based on the pace of walking. c. They are based on the total time spent doing physical activity. d. They are based on types of physical activity.
The Wernicke–Korsakoff syndrome in people with chronic alcohol abuse stems primarily from a deficiency of ____.
a. folate b. thiamin c. antidiuretic hormone d. alcohol dehydrogenase e. protein
What vitamin is produced from the amino acid tryptophan and can increase HDL-cholesterol?
A) Thiamin B) Vitamin B12 C) Niacin D) Vitamin A E) a, b
Oxalates are acids in spinach which ________ calcium absorption
A) reduce B) acidify C) have no effect on D) increase