Sterols

Question 1

Structure of a Sterol

Answer 1

• Have a multiple-ring structure
• Best known example is cholesterol
• Most contain no fatty acid

Question 2

Functions of Sterols

Answer 2

Major structural component of all cell membranes

Precursor of important substances, including

      - Vitamin D
      - Sterol hormones
      - Bile salts

Question 3

Cholesterol Synthesis

Answer 3

Primarily made in the liver

Question 4

Sterols in Food

Answer 4

Found only in foods of animal origin

Typical American consumers between 250-700 mg of cholesterol and 250 milligrams of plant sterols per day