Question

HDL is called good cholesterol because it

• A. Transports cholesterol from tissues to liver
• B. Transports triglycerides from intestine
• C. Carries cholesterol from liver to tissues
• D. Increases fat deposition in blood vessels

Hint:

HDL is good cholesterol because it carries cholesterol from tissues back to the liver.

Answer 1

The Correct Option is A

HDL, or High-Density Lipoprotein, is referred to as "good cholesterol" due to its role in transporting cholesterol from the tissues back to the liver. This process is called reverse cholesterol transport. Here's a detailed explanation:

1. Role of HDL in Cholesterol Transport: HDL particles are crucial because they help remove excess cholesterol from the bloodstream and tissues, transporting it to the liver for excretion or reprocessing. This helps lower the risk of cholesterol depositing in blood vessels, which can lead to atherosclerosis, a condition that increases the risk of heart disease and stroke.
2. Why HDL is Good for Health:
   • HDL aids in cleaning up the excess cholesterol in the arteries and tissues.
   • This process helps prevent the buildup of plaques in the arterial walls, thus reducing the risk of cardiovascular diseases.
3. Justification of the Correct Option: The correct answer is Transports cholesterol from tissues to liver. This option correctly describes the primary function of HDL in the human body.
   • The other options incorrectly describe HDL’s functions:
     • Transports triglycerides from intestine: This is primarily the role of chylomicrons.
     • Carries cholesterol from liver to tissues: This is the function of Low-Density Lipoprotein (LDL), often termed "bad cholesterol."
     • Increases fat deposition in blood vessels: This is an incorrect description of HDL's function as it helps reduce fat deposition.

This understanding highlights the protective role HDL plays in maintaining cardiovascular health by facilitating the transport of cholesterol to the liver, where it can be metabolized or excreted.