Lipoprotein Metabolism: Cholesterol and Triglycerides Functions
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Questions and Answers

Which lipoprotein is produced by the liver to send triglycerides to cells for energy during fasting?

  • HDL
  • LDL
  • Chylomicrons
  • VLDL (correct)

    • What is the main source of immediate and stored energy in the body?

  • HDL
  • Cholesterol
  • Triglycerides (correct)
  • LDL

    • Which lipoprotein removes excess cholesterol from tissues?

  • Chylomicrons
  • HDL (correct)
  • LDL
  • VLDL

    • How is cholesterol mainly excreted from the body?

    <p>In feces as bile acids</p> Signup and view all the answers

    What is the main component in atherosclerosis according to the text?

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

    Which cells do NOT synthesize cholesterol according to the text?

    <p>Mature RBCs</p> Signup and view all the answers

    What is the function of chylomicrons according to the text?

    <p>Contain dietary fats and cholesterol</p> Signup and view all the answers

    How are fats absorbed in enterocytes?

    <p>Converted into glycerol and free fatty acids</p> Signup and view all the answers

    What happens to VLDL remnants in the bloodstream?

    <p>Broken down into LDL for uptake by tissues</p> Signup and view all the answers

    How do HDLs remove cholesterol from cells?

    <p>Interact with cell macrophages to pull out cholesterol</p> Signup and view all the answers

    What is the main function of lipoprotein lipase?

    <p>Break down triglycerides in chylomicrons</p> Signup and view all the answers

    How does statin medication affect cholesterol levels?

    <p>Reduces HMG CoA reductase activity</p> Signup and view all the answers

    What is the role of ApoA1 protein in cholesterol metabolism?

    <p>Helps pull out cholesterol from cell macrophages</p> Signup and view all the answers

    How does lipoprotein (a) differ from LDL?

    <p>Associated with high risk of coronary heart disease</p> Signup and view all the answers

    What distinguishes primary from secondary dyslipidemia?

    <p>Genetic factors causing severe lipid elevations</p> Signup and view all the answers

    What happens to LDL after being taken up by cells?

    <p>Goes to the endoplasmic reticulum for cholesterol release.</p> Signup and view all the answers

    How do chylomicrons differ from VLDLs in terms of clearance?

    <p>VLDL remnants are removed by the liver, unlike chylomicron remnants.</p> Signup and view all the answers

    How do remnant receptors differ from LDL receptors in terms of function?

    <p>Remnant receptors specifically clear remnants of chylomicrons.</p> Signup and view all the answers

    What is a genetic factor contributing to high LDL levels?

    <p>Impaired function of LDL receptors</p> Signup and view all the answers

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