Answer to Question 1Toxicity refers to the negative effects of substances on an animal. In this chapter it refers to the effects of
overfeeding or over-supplementation of vitamins or minerals
Answer to Question 2Fat-soluble vitamins include A, D, E, and K.
Water-soluble vitamins include C and the B-complex vitamins.
Vitamin A is associated with good vision, respiration, digestion, and reproduction.
Vitamin D is associated with calcium and phosphorus in the body.
Vitamin E is important for successful reproduction.
Vitamin K is necessary for maintenance of normal blood coagulation.
Vitamin C, or ascorbic acid, is synthesized by most animals and is not a consideration in feeding rations.
Guinea pigs and primates must receive dietary vitamin C to prevent scurvy.
Vitamin B1, or thiamine, is necessary for normal metabolism of carbohydrates. It is needed to prevent a
deficiency disease called polyneuritis or beri-beri.
Vitamin B2, or riboflavin, is necessary for normal bone development.
Niacin is necessary for digestion and growth.
Pantothenic acid is necessary for proper growth and nerve development.
Vitamin B12, or cyanocobalamin, is necessary for normal growth, reproduction, and blood formation.
Choline functions in the transportation and metabolism of fatty acids.
Folic acid, or folacin, is required for normal cell development and is essential in certain biochemical reactions.
Biotin is important in carbohydrate and fat metabolism.
Vitamin B6, or pyridoxine, helps build proteins and is essential in the metabolism of carbohydrates.