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Questions and Answers
What is a triglyceride composed of?
What is a triglyceride composed of?
3 fatty acids bonded to glycerol
During exercise, which of the following triggers the breakdown of stored fat?
During exercise, which of the following triggers the breakdown of stored fat?
- Cortisol
- Insulin
- Glucagon
- Adrenaline (correct)
What is the primary form of fat in the diet?
What is the primary form of fat in the diet?
triglycerides
Which of the following describes lipids?
Which of the following describes lipids?
What is the process of straightening an unsaturated fatty acid to create a more solid fat that resists rancidity called?
What is the process of straightening an unsaturated fatty acid to create a more solid fat that resists rancidity called?
Which of the following are NOT major classes of dietary lipids?
Which of the following are NOT major classes of dietary lipids?
A fatty acid that contains a chain of ten carbons and one double carbon bond is a?
A fatty acid that contains a chain of ten carbons and one double carbon bond is a?
Sex hormones and adrenal hormones are derived from which class of lipids?
Sex hormones and adrenal hormones are derived from which class of lipids?
How many calories does 25 grams of fat provide?
How many calories does 25 grams of fat provide?
Which lipoprotein is produced in the enterocytes and transports dietary fat into the lymphatic system?
Which lipoprotein is produced in the enterocytes and transports dietary fat into the lymphatic system?
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Study Notes
Triglycerides
- Comprised of three fatty acids linked to a glycerol molecule.
- Serve as the primary form of dietary fat.
Fat Breakdown During Exercise
- Triggered by the hormone adrenaline, which stimulates the breakdown of stored fat for energy.
Lipid Characteristics
- Lipids are organic compounds that are not soluble in water, encompassing various subclasses.
Hydrogenation Process
- A method to solidify unsaturated fatty acids, enhancing fat stability and shelf life while resisting rancidity.
Major Dietary Lipids
- Glycogens are not classified as major dietary lipids; key classes include triglycerides, phospholipids, and sterols.
Fatty Acid Composition
- Monounsaturated fatty acids have a carbon chain with one double bond and can vary in length.
- A fatty acid with ten carbons and one double bond is categorized as a medium-chain monounsaturated fatty acid.
Hormonal Derivatives
- Sex hormones and adrenal hormones are synthesized from sterols, a class of lipids that include cholesterol.
Caloric Content of Fat
- Fat provides approximately 9 calories per gram; thus, 25 grams of fat equates to 225 calories.
Chylomicrons
- Chylomicrons are lipoproteins produced in enterocytes that transport dietary fats into the lymphatic system for distribution in the body.
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