Podcast
Questions and Answers
Which of the following substances is classified as a lipid?
Which of the following substances is classified as a lipid?
- Phosphates
- Glycogens
- Cholecystokinin (CCK)
- Sterols (correct)
The MOST common lipids found in food are:
The MOST common lipids found in food are:
- Glycerols
- Triglycerides (correct)
- Sterols
- Phospholipids
The body stores lipids as:
The body stores lipids as:
- Phospholipids
- Glycerols
- Triglycerides (correct)
- Sterols
A triglyceride is comprised of:
A triglyceride is comprised of:
Triglycerides can be classified by which of the following characteristics?
Triglycerides can be classified by which of the following characteristics?
A fatty acid comprised of a 10-carbon chain and one double bond is characterized as a:
A fatty acid comprised of a 10-carbon chain and one double bond is characterized as a:
A fatty acid comprised of a 16-carbon chain with no points of unsaturation is called a(n):
A fatty acid comprised of a 16-carbon chain with no points of unsaturation is called a(n):
Which of the following fatty acids is typically solid at room temperature?
Which of the following fatty acids is typically solid at room temperature?
Which of the following foods is BEST characterized as a rich source of saturated fatty acids?
Which of the following foods is BEST characterized as a rich source of saturated fatty acids?
Which of the following is BEST characterized as a rich source of polyunsaturated fatty acids?
Which of the following is BEST characterized as a rich source of polyunsaturated fatty acids?
The process of adding hydrogen to an unsaturated fatty acid is called:
The process of adding hydrogen to an unsaturated fatty acid is called:
Diets high in trans fatty acids are MOST associated with:
Diets high in trans fatty acids are MOST associated with:
Which of the following statements is true about trans fatty acids?
Which of the following statements is true about trans fatty acids?
Which of the following ingredients would alert you to the presence of trans fatty acids in a food product?
Which of the following ingredients would alert you to the presence of trans fatty acids in a food product?
Essential fatty acids (EFAs) are precursors needed to produce which type of biological compounds?
Essential fatty acids (EFAs) are precursors needed to produce which type of biological compounds?
Which essential fatty acid plays an important role in reducing a person's risk for heart disease?
Which essential fatty acid plays an important role in reducing a person's risk for heart disease?
The two essential fatty acids are:
The two essential fatty acids are:
Which of the following foods is the richest source of omega-3 fatty acids?
Which of the following foods is the richest source of omega-3 fatty acids?
Why are phospholipids NOT considered to be essential nutrients?
Why are phospholipids NOT considered to be essential nutrients?
Which type(s) of phospholipids act as an emulsifier?
Which type(s) of phospholipids act as an emulsifier?
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!
