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 (B)</p> Signup and view all the answers

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

<p>LDL (A)</p> Signup and view all the answers

Which cells do NOT synthesize cholesterol according to the text?

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

What is the function of chylomicrons according to the text?

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

How are fats absorbed in enterocytes?

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

What happens to VLDL remnants in the bloodstream?

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

How do HDLs remove cholesterol from cells?

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

What is the main function of lipoprotein lipase?

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

How does statin medication affect cholesterol levels?

<p>Reduces HMG CoA reductase activity (C)</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 (D)</p> Signup and view all the answers

How does lipoprotein (a) differ from LDL?

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

What distinguishes primary from secondary dyslipidemia?

<p>Genetic factors causing severe lipid elevations (C)</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. (A)</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. (A)</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. (D)</p> Signup and view all the answers

What is a genetic factor contributing to high LDL levels?

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

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