Which of the following observations is an example of a positive correlation?
A. When a population's level of physical activity increases, the percentage of people who develop heart disease decreases.
B. When a population's level of vitamin C in white blood cells increases, the percentage of people in the population who develop scurvy decreases.
C. When a population's vitamin D intake decreases, the percentage of people in the population that have healthy immune systems decreases.
D. When a population's intake of plant foods decreases, the percentage of obese people in that population increases.
Answer: C
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Compared with younger adults, the protein needs of older adults (per unit of body weight) are:
a. considerably less. b. the same or less. c. the same or more. d. considerably more.
What is the actual ratio of calcium to protein intake (mg to g) for most U.S. women?
a. 3:1 b. 9:1 c. 13:1 d. 21:1 e. 36:1
Which vegetable is from the cruciferous family?
a. garlic b. broccoli c. onions d. carrots e. green peppers
Hardening of the arteries due to a buildup of plaque is known as ____
A) angina B) osteoporosis C) hypertension D) atherosclerosis E) diverticulitis