Domanda del libro di testo
Identify each lipoprotein described here as either chylomicron, HDL, LDL, or VLDL.
d. Which lipoprotein contains “bad cholesterol” from a vascular disease risk standpoint?
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Ch.24 Lipid Metabolism
McMurry8th EditionFundamentals of General, Organic, and Biological ChemistryISBN: 9780134015187
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TOC.tableOfContents
- Ch.1 Matter and Measurements27
- Ch.2 Atoms and the Periodic Table20
- Ch.3 Ionic Compounds8
- Ch.4 Molecular Compounds23
- Ch.5 Classification & Balancing of Chemical Reactions12
- Ch.6 Chemical Reactions: Mole and Mass Relationships28
- Ch.7 Chemical Reactions: Energy, Rate and Equilibrium64
- Ch.8 Gases, Liquids and Solids24
- Ch.9 Solutions52
- Ch.10 Acids and Bases25
- Ch.11 Nuclear Chemistry22
- Ch.12 Introduction to Organic Chemistry: Alkanes57
- Ch.13 Alkenes, Alkynes, and Aromatic Compounds47
- Ch.14 Some Compounds with Oxygen, Sulfur, or a Halogen50
- Ch.15 Aldehydes and Ketones45
- Ch.16 Amines42
- Ch.17 Carboxylic Acids and Their Derivatives57
- Ch.18 Amino Acids and Proteins82
- Ch.19 Enzymes and Vitamins63
- Ch.20 Carbohydrates44
- Ch.21 The Generation of Biochemical Energy65
- Ch.22 Carbohydrate Metabolism45
- Ch.23 Lipids42
- Ch.24 Lipid Metabolism33
- Ch.25 Protein and Amino Acid Metabolism24
- Ch.26 Nucleic Acids and Protein Synthesis45
McMurry8th EditionFundamentals of General, Organic, and Biological ChemistryISBN: 9780134015187Non è quello che usi tu?Cambia libro di testo
Capitolo 24, Problema 19
Why do lipids make you feel full for a long time after a meal?
Guida verificata passo dopo passo1
Lipids are a type of macronutrient that provide a high amount of energy per gram (9 kcal/g), which is more than carbohydrates (4 kcal/g) or proteins (4 kcal/g). This high energy density means they take longer to metabolize, contributing to a prolonged feeling of fullness.
Lipids are digested more slowly than carbohydrates and proteins because they require emulsification by bile salts in the small intestine before enzymes like lipase can break them down. This slower digestion rate delays gastric emptying, keeping food in the stomach longer and promoting satiety.
The digestion of lipids triggers the release of hormones such as cholecystokinin (CCK) and peptide YY (PYY). These hormones signal the brain to reduce appetite and increase the sensation of fullness.
Lipids are hydrophobic molecules, which means they form micelles during digestion. This process takes time and further contributes to the slower absorption and prolonged satiety effect.
The slower digestion and absorption of lipids, combined with their hormonal effects, make them effective at providing a sustained feeling of fullness after a meal.
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Lipid Digestion and Absorption
Lipids, or fats, undergo a complex digestion process that begins in the stomach and continues in the small intestine. They are emulsified by bile salts, allowing enzymes like lipase to break them down into fatty acids and glycerol. This slow digestion process contributes to a prolonged feeling of fullness, as fats take longer to break down compared to carbohydrates and proteins.
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Percorso guidato
1:41
Digestion of Lipids Example 1
Hormonal Regulation of Satiety
The consumption of lipids triggers the release of hormones such as cholecystokinin (CCK) and peptide YY (PYY), which signal satiety to the brain. These hormones help regulate appetite and promote a feeling of fullness, making it less likely for individuals to feel hungry soon after a meal that is high in fats.
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Percorso guidato
2:57Allosteric Control Concept 1
Caloric Density of Lipids
Lipids are more calorie-dense than carbohydrates and proteins, providing about 9 calories per gram compared to 4 calories per gram for the latter two. This high caloric density means that even small amounts of fat can significantly contribute to energy intake, leading to a greater sense of fullness and satisfaction after meals.
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01:56Density
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