What level of lifetime cancer risk to human beings from a food additive is accepted by the FDA?
a. 1 in 100
b. 1 in 1,000
c. 1 in 1,000,000
d. 1 in 100,000,000
e. 1 in 1,000,000,000,000
ANS: C
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a. duodenum. b. jejunum. c. colon. d. ileum.
Why is important to detect whether cancer has spread to lymph nodes?
a. because T and B cells are differentiated in the nodes b. because cancer cells can then be spread throughout the body c. because lymph organs allow antigens to interact with antigen-specific cells d. because cancer cells will be destroyed by concentrated lymphoid tissue
Phenylketonuria is an inborn error of metabolism that affects the ability to metabolize _____.
A. insulin B. tryptophan C. phenylalanine D. ketones E. gluten
Which of the following statements about milk is false?
A) It is approximately 80 percent water by volume. B) It contains a substantial variety of all six classes of nutrients. C) It contains the minerals potassium and calcium. D) It is a good source of the vitamins A, D, and riboflavin.