Programmed aging theories propose that senescence occurs because
a. the telomeres capping the ends of chromosomes become shorter with each cell division and their loss eventually stops the chromosomes from replicating.
b. mistakes in the replication of cells or buildup of damaging by-products from biologic processes eventually destroy the organism.
c. unstable oxygen, formed normally during metabolism, can damage cells by initiating reactions that break down cell membranes.
d. fast-paced living shortens one's lifespan.
a
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Which of the following statements regarding phytochemicals is true?
a) They are essential for life. b) They are always harmful to our health. c) They are found in plant foods. d) They contribute to the calories that we eat in our diet.
The Nutrition Facts panel must routinely provide information about _____
a. dietary fiber b. vitamin B12 c. vitamin D d. potassium e. zinc
The Delphi technique is: a. done using questionnaires and written comments
b. preferred because it allows for greater generation of new ideas. c. carried out entirely within a group setting. d. the least similar to nominal group technique.
The Recommended Dietary Allowance ( RDA ) for protein meets the needs of strength and
endurance athletes. Indicate whether the statement is true or false