Which statement about the free-radical theory of aging is false?
a. Free radicals are produced during metabolism.
b. Free radicals are unstable molecules.
c. Free radicals are produced by reduction reactions, damaging cell proteins, membranes, and DNA.
d. Damage by free radicals is associated with cancer and heart disease.
C
Health & Biomechanics
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Currently, approximately what percentage of women smokes?
A. 17% B. 15.2% C. 32% D. 42.1%
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The kidneys are part of the hematic system
Indicate whether the statement is true or false
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Preferred Provider Organizations (PPOs) are groups of health care providers and hospitals who negotiate plans with health care agencies.
Answer the following statement true (T) or false (F)
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Exercise has no positive effects on the nervous system.
a. true b. false
Health & Biomechanics