Lipid Digestion Enzymes Overview
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Questions and Answers

Which enzyme promotes the uptake of lipoprotein contents, particularly fatty acids, into cells?

  • Lipoprotein lipase (correct)
  • Lipoprotein kinase
  • Lipoprotein glycerol
  • Amylase
  • What is the primary storage location for lipids in the body?

  • Lungs
  • Kidneys
  • Liver (correct)
  • Intestines
  • Which lipoprotein is mainly composed of triglycerides and is produced by the liver for lipid transport?

  • Low-density lipoprotein (LDL)
  • High-density lipoprotein (HDL)
  • Very low-density lipoprotein (VLDL) (correct)
  • Chylomicron
  • Where do blood vessels near lipid-desiring tissues, such as muscle and fat tissue, express lipoprotein lipase (LPL)?

    <p>Surface of the blood vessels</p> Signup and view all the answers

    What happens to the lipoprotein structure as triglycerides are taken up by cells through lipid digestion?

    <p>It becomes denser</p> Signup and view all the answers

    Why does natural peanut butter separate into a lower protein-rich portion and an upper lipid-rich portion?

    <p>Proteins in peanut butter are hydrophilic, while lipids are hydrophobic.</p> Signup and view all the answers

    Why do processed peanut butter and natural peanut butter behave differently when it comes to separation of components?

    <p>Processed peanut butter has emulsifiers that prevent separation, while natural butter lacks them.</p> Signup and view all the answers

    What is the role of lingual lipase in lipid digestion?

    <p>Lingual lipase breaks down triglycerides into fatty acids and glycerol.</p> Signup and view all the answers

    Why are vitamins A, D, E, and K classified as fat-soluble vitamins instead of lipids in nutrition?

    <p>Although hydrophobic, these vitamins are essential for various physiological processes.</p> Signup and view all the answers

    Why is the initial breakdown of triglycerides necessary in lipid digestion?

    <p>Triglycerides need to be converted into fatty acids and glycerol for absorption.</p> Signup and view all the answers

    What is the main difference between lipids and other molecules?

    <p>They are hydrophobic and do not dissolve readily in water</p> Signup and view all the answers

    Which molecule is considered the main dietary lipid?

    <p>Fatty acids</p> Signup and view all the answers

    How are fatty acids categorized?

    <p>By their length, degree of saturation, and geometric organization</p> Signup and view all the answers

    What is the structure of a triglyceride?

    <p>A glycerol backbone with three fatty acids attached</p> Signup and view all the answers

    How do saturated and unsaturated fatty acids differ?

    <p>They differ in degree of saturation</p> Signup and view all the answers

    What is the primary function of bile in lipid digestion?

    <p>Emulsifying larger lipid structures into smaller ones</p> Signup and view all the answers

    Where does the majority of lipid digestion take place?

    <p>Small intestine</p> Signup and view all the answers

    What prevents lipids from being digested and absorbed if not broken down by lipases?

    <p>Lack of lipase activity</p> Signup and view all the answers

    What is the purpose of gastric lipase in lipid digestion?

    <p>Breaking down small- and medium-chain fatty acids</p> Signup and view all the answers

    What is the structure of bile that allows it to emulsify lipids?

    <p>Amphiphilic structure with hydrophobic tails and hydrophilic heads</p> Signup and view all the answers

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