Lipoprotein Metabolism: Cholesterol and Triglycerides Functions

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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?

In feces as bile acids Signup and view all the answers

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

LDL Signup and view all the answers

Which cells do NOT synthesize cholesterol according to the text?

Mature RBCs Signup and view all the answers

What is the function of chylomicrons according to the text?

Contain dietary fats and cholesterol Signup and view all the answers

How are fats absorbed in enterocytes?

Converted into glycerol and free fatty acids Signup and view all the answers

What happens to VLDL remnants in the bloodstream?

Broken down into LDL for uptake by tissues Signup and view all the answers

How do HDLs remove cholesterol from cells?

Interact with cell macrophages to pull out cholesterol Signup and view all the answers

What is the main function of lipoprotein lipase?

Break down triglycerides in chylomicrons Signup and view all the answers

How does statin medication affect cholesterol levels?

Reduces HMG CoA reductase activity Signup and view all the answers

What is the role of ApoA1 protein in cholesterol metabolism?

Helps pull out cholesterol from cell macrophages Signup and view all the answers

How does lipoprotein (a) differ from LDL?

Associated with high risk of coronary heart disease Signup and view all the answers

What distinguishes primary from secondary dyslipidemia?

Genetic factors causing severe lipid elevations Signup and view all the answers

What happens to LDL after being taken up by cells?

Goes to the endoplasmic reticulum for cholesterol release. Signup and view all the answers

How do chylomicrons differ from VLDLs in terms of clearance?

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

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

Remnant receptors specifically clear remnants of chylomicrons. Signup and view all the answers

What is a genetic factor contributing to high LDL levels?

Impaired function of LDL receptors Signup and view all the answers

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?

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

Which lipoprotein removes excess cholesterol from tissues?

How is cholesterol mainly excreted from the body?

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

Which cells do NOT synthesize cholesterol according to the text?

What is the function of chylomicrons according to the text?

How are fats absorbed in enterocytes?

What happens to VLDL remnants in the bloodstream?

How do HDLs remove cholesterol from cells?

What is the main function of lipoprotein lipase?

How does statin medication affect cholesterol levels?

What is the role of ApoA1 protein in cholesterol metabolism?

How does lipoprotein (a) differ from LDL?

What distinguishes primary from secondary dyslipidemia?

What happens to LDL after being taken up by cells?

How do chylomicrons differ from VLDLs in terms of clearance?

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

What is a genetic factor contributing to high LDL levels?

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