The hemoglobin molecule:
A. carries oxygen from the lungs to the tissues.
B. contains 4 heme compounds.
C. decreases during iron deficiency anemia.
D. All of these choices are accurate.
Answer: D
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Which of the following substances is a contaminant mineral?
a. Nickel b. Copper c. Lead d. Bromine e. Boron
Vitamin E protects cell membranes by donating electrons, thereby stabilizing free radicals that damage the fatty acids in phospholipid bilayers
Indicate whether the statement is true or false
________ is a building block of vitamin D and other hormones.
A. Estrogen B. Cholesterol C. Hydroxyapatite D. Calcitriol
Amino acid supplements should be used with caution for all of the following reasons EXCEPT:
a. their effectiveness is not guaranteed. b. their purity is not guaranteed. c. the evidence from long-term safety studies. d. the dose provided by each pill is not guaranteed.