For most Americans, the most important dietary change to make in order to reduce blood LDL-cholesterol levels is to reduce intake of:
a. polyunsaturated fat.
b. cholesterol.
c. saturated and trans fats.
d. monounsaturated fat.
e. fish oils.
c
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Research suggests that pregnancy-induced hypertension is related to diets that are deficient in protein, kilocalories (kcalories or kcal), and:
a. calcium, magnesium, and potassium. b. iron, zinc, and folate. c. vitamin A, vitamin C, and vitamin B12. d. iodine and B vitamins.
Urine leaves the kidneys via the _____ that empty into the bladder
a. renal ducts b. nephrons c. renal sphincters d. ureters
In the context of scientific research, correlation occurs when:
A) an alteration to one variable causes a change in another variable. B) study participants experience an effect of the treatment just because they believe that the treatment will work. C) two variables are clearly related, but one cannot be shown to cause the other. D) neither the study participants nor the scientists know the group to which the participants have been assigned.
The role of fiber is to
A) provide kilocalories. B) increase appetite. C) repel water. D) helps maintain a healthy intestinal tract.