In the large intestine, chemical digestion takes place due to the efforts of
A. helpful bacteria.
B. enzymes.
C. bile.
D. hydrochloric acid.
ANS: A
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Water expands when it freezes, and the resulting ice crystals pierce the food's cell walls, rupturing them and causing the food to take on an inferior texture
Indicate whether the statement is true or false
Programmed theories of aging propose that
A) the aging process follows a random sequence of physiological events. B) aging occurs as a result of cell and tissue damage. C) aging follows a biologically driven time line. D) we still don't know exactly why humans age.
Training improves the muscles' ability to use which of the following fuel sources?
a. Glucose b. Amino acids c. Fatty acids d. Ketones
Which of the follo physical ?tness?
A) motor skills B) body composition C) muscular endurance D) cardiorespiratory ?tness