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HNU 242 EXAM STUDY GUIDE
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HNU 242 EXAM STUDY GUIDE ...
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HNU 242 EXAM STUDY GUIDEAntioxidants - Answer substances that protect against oxidative damage
oxidative stress - Answer a condition that occurs when there are more ROS than what
can be neutralized
Vitamin C: in collagen synthesis - Answer acts as a coenzyme
produces cross-linked connective tissue
Vitamin C: Antioxidant role - Answer goes from ascorbic acid -> dehydroascrobic acid
form to neutralize FR
Vitamin C: deficiency - Answer scurvy
Vitamin E: absorption - Answer incorporated into chylomicrons
Vitamin E: antioxidant role - Answer neutralizes FR
Vitamin C's role in Vitamin E's antioxidant role - Answer vitamin c helps regenerate
vitamin e to its previous form
vitamin e: chronic disease prevention role - Answer prevents LDL oxidation
prevents blood clot formation
Antioxidant functions - Answer possible prevention of CVD, cancer, alzheimer's, and
macular degeneration
dietary antioxidants - Answer vitamin e
vitamin c
selenium
exogenous - Answer comes from outside the body (diet)
endogenous - Answer comes from inside the body (enzyme system)
Vitamin A: roles - Answer key roles in night vision, cell differentiation, and growth
regulation
vitamin a: deficiency - Answer night blindness; eventually xerophthalmia
beta-carotene antioxidant function - Answer unconverted carotenes can function as
dietary antioxidants
Manganese: antioxidant role - Answer needed to form SOD to block FR propagation
Selenium: antioxidant role - Answer neutralizes peroxides before becoming FR
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