List some factors that influence plasma cholesterol levels. Also list the sources and fates of cholesterol in the body.

Certain diet plans claim that a person may eat all the protein he or she wants, as protein is not stored by the body. Is this claim completely accurate? Explain.

Which of the following statements is false?

a. Fiber is a polysaccharide that is completely or partially indigestible by the human body.

b. A complete protein contains all the essential amino acids.

c. Saturated fats contain hydrogen atoms arranged on opposite sides of the carbon-carbon double bond.

d. Linoleic and linolenic acid are essential fatty acids.

How do fat-soluble and water-soluble vitamins differ? Which vitamins are fat-soluble?