Cholesterol

Definition

Cholesterol is a waxy, fat-like substance found in all cells of the body. It is essential for producing hormones, vitamin D, and substances that help digest foods.

5 Must Know Facts For Your Next Test

1. Cholesterol is carried through the bloodstream by lipoproteins, which include low-density lipoprotein (LDL) and high-density lipoprotein (HDL).
2. High levels of LDL cholesterol can lead to plaque buildup in arteries, increasing the risk of cardiovascular diseases.
3. HDL cholesterol helps transport cholesterol from other parts of your body back to your liver, which removes it from your body.
4. Dietary sources of cholesterol include animal products like meat, dairy, and eggs.
5. The liver produces enough cholesterol for the body's needs, so dietary intake should be monitored to prevent excess levels.

Review Questions

• What are the two main types of lipoproteins that carry cholesterol in the blood?
• How does high LDL cholesterol affect cardiovascular wellness?
• Why is HDL cholesterol often referred to as 'good' cholesterol?

Related terms

LDL (Low-Density Lipoprotein): Often called 'bad' cholesterol because high levels can lead to plaque buildup in arteries.

HDL (High-Density Lipoprotein): Known as 'good' cholesterol because it helps remove other forms of cholesterol from your bloodstream.

Triglycerides:

A type of fat found in your blood that can increase heart disease risk when elevated.