What are provitamins?
A) inactive enzymes that become activated with the help of prooxidants
B) vitamins with overwhelmingly positive effects when taken in the correct amounts
C) inactive forms of vitamins that the body cannot use until they're converted to their active form
D) vitamins with antioxidant properties
C
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Fats and proteins may have a protective effect on tooth enamel
Indicate whether the statement is true or false
The American Institute for Cancer Research has recommended all of the following for cancer prevention except:
a. If you drink alcoholic beverages, limit consumption. b. Eat more of a variety of fruits and vegetables each day. c. Choose refined grains daily. d. Limit consumption of red meats.
Which is an example of a factor that contributes to lower esophageal sphincter incompetence?
A. renal artery stenosis B. increased secretion of aldosterone C. cardiomyopathy D. cigarette smoking E. increased secretion of cortisol
Vitamin B 6 is NOT involved in which physiologic process?
a. Formation of non-essential amino acids b. Hemoglobin synthesis c. Collagen formation d. Formation of white blood cells important for immunity