How are the RDA for almost all vitamin and mineral intakes set?
a. Low, to reduce the risk of toxicity
b. High, to cover virtually all healthy individuals
c. Extremely high, to cover every single person
d. At the mean, to cover most healthy individuals
b
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An important buffer in the maintenance of the acid-base balance of the blood is:
a. fatty acids. b. lactic acid. c. protein. d. carbohydrate.
The difference between the embryonic phase and the pre-embryonic phase is that:
A) the embryonic phase occurs during the first two weeks of pregnancy, whereas the pre-embryonic phase describes the period from two to eight weeks of pregnancy. B) zygote formation occurs after the embryonic phase, whereas blastocyst formation takes place after the pre-embryonic phase. C) the embryonic phase begins at week nine of pregnancy, whereas the pre-embryonic phase begins at week two. D) organ formation and development begin during the embryonic phase, whereas blastocyst formation occurs in the pre-embryonic phase.
Toxicity of which element results in green tongue, diarrhea, and GI cramps??
A) ?vanadium B) ?silicon C) ?arsenic D) ?boron
If a child is reluctant to try a new food, it is best to
a. send the child to his/her room. b. withhold dessert until all food on the plate is eaten. c. quietly remove it and present it again at another time. d. encourage other family members to coax the child to eat it.