Nutrition Science Chapter 5 Quiz
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Questions and Answers

Which of the following substances is classified as a lipid?

  • Phosphates
  • Glycogens
  • Cholecystokinin (CCK)
  • Sterols (correct)
  • The MOST common lipids found in food are:

  • Glycerols
  • Triglycerides (correct)
  • Sterols
  • Phospholipids
  • The body stores lipids as:

  • Phospholipids
  • Glycerols
  • Triglycerides (correct)
  • Sterols
  • A triglyceride is comprised of:

    <p>Three fatty acids and one glycerol</p> Signup and view all the answers

    Triglycerides can be classified by which of the following characteristics?

    <p>The shape, length, and saturation of the fatty acids</p> Signup and view all the answers

    A fatty acid comprised of a 10-carbon chain and one double bond is characterized as a:

    <p>Monounsaturated, medium-chain fatty acid</p> Signup and view all the answers

    A fatty acid comprised of a 16-carbon chain with no points of unsaturation is called a(n):

    <p>Saturated, long-chain fatty acid</p> Signup and view all the answers

    Which of the following fatty acids is typically solid at room temperature?

    <p>Saturated</p> Signup and view all the answers

    Which of the following foods is BEST characterized as a rich source of saturated fatty acids?

    <p>Butter</p> Signup and view all the answers

    Which of the following is BEST characterized as a rich source of polyunsaturated fatty acids?

    <p>Corn oil</p> Signup and view all the answers

    The process of adding hydrogen to an unsaturated fatty acid is called:

    <p>Hydrogenation</p> Signup and view all the answers

    Diets high in trans fatty acids are MOST associated with:

    <p>Increased blood cholesterol levels</p> Signup and view all the answers

    Which of the following statements is true about trans fatty acids?

    <p>They result from the hydrogenation process</p> Signup and view all the answers

    Which of the following ingredients would alert you to the presence of trans fatty acids in a food product?

    <p>Hydrogenated vegetable oil</p> Signup and view all the answers

    Essential fatty acids (EFAs) are precursors needed to produce which type of biological compounds?

    <p>Eicosanoids</p> Signup and view all the answers

    Which essential fatty acid plays an important role in reducing a person's risk for heart disease?

    <p>Alpha-linolenic acid</p> Signup and view all the answers

    The two essential fatty acids are:

    <p>Linoleic and alpha-linolenic acid</p> Signup and view all the answers

    Which of the following foods is the richest source of omega-3 fatty acids?

    <p>Salmon</p> Signup and view all the answers

    Why are phospholipids NOT considered to be essential nutrients?

    <p>Our bodies manufacture phospholipids</p> Signup and view all the answers

    Which type(s) of phospholipids act as an emulsifier?

    <p>Lecithins</p> Signup and view all the answers

    Study Notes

    Lipids and Their Classification

    • Lipids include substances such as sterols, triglycerides, and phospholipids.
    • The most common lipids in food are triglycerides, which the body stores as fat.
    • A triglyceride consists of three fatty acids and one glycerol molecule.

    Characteristics of Triglycerides

    • Triglycerides can be categorized based on the shape, length, and saturation of their fatty acids.
    • Fatty acids can vary in chain length and saturation, affecting their properties and behavior in the body.

    Types of Fatty Acids

    • Monounsaturated fatty acids, such as those with a 10-carbon chain and one double bond, have beneficial health effects.
    • Saturated long-chain fatty acids contain no double bonds and are typically solid at room temperature.

    Sources of Fatty Acids

    • Foods rich in saturated fatty acids include butter, while corn oil is a prime source of polyunsaturated fatty acids.
    • Essential fatty acids include linoleic and alpha-linolenic acid, which play significant roles in heart health.

    Trans Fatty Acids

    • Trans fatty acids form through hydrogenation, a process that adds hydrogen to unsaturated fatty acids.
    • Diets high in trans fatty acids are linked to increased blood cholesterol levels.
    • Ingredients like hydrogenated vegetable oil indicate the presence of trans fatty acids in food products.

    Role of Essential Fatty Acids

    • Essential fatty acids are critical precursors for producing eicosanoids, which are important biological compounds that regulate various body functions.
    • Alpha-linolenic acid is particularly noted for its heart-protective properties.

    Phospholipids

    • Phospholipids are not essential nutrients since the body can manufacture them.
    • Lecithins, a type of phospholipid, act as emulsifiers in food, helping to blend ingredients that typically don't mix well.

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    Description

    Test your knowledge on lipids with this quiz based on Chapter 5 of The Science of Nutrition. You'll answer questions about various types of lipids, their functions, and their roles in the body. Perfect for students looking to reinforce their understanding!

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