Exp 11: Cholesterol Lab

The image represnts which of the following chemical structure?

squalene

Which of the following is derived from a sterol?

Bile salts

Which of the following molecule transports lipids from intestine to the liver?

Chylomicrons

Formula to calculate total cholesterol or serum cholesterol (mg/dL)

(Aserum-Ablank)/(Acalibrator-Ablank) *calibrator

Total blood cholesterol

A total blood cholesterol level less than 200 mg/dl is desirable. This level of total cholesterol is associated with the least risk of heart disease.

Which compound is the source of all Carbon in cholesterol?

Acetyl CoA

Cholesterol is a 4 ringed sterol containg 27 carbons. The structure consisting of a hydroxyl group at ___ and 8-10 C side chain on ___.

C-3 C-17

LDL cholesterol

LDL cholesterol can slowly accumulated on the walls of arteries that feed blood to the heart and brain. LDL cholesterol is also known as "bad" cholesterol because a high level indicates an increased risk of heart disease. LDL cholesterol levels less than 130 mg/dl is desirable.

In ___________ cells dietary cholesterol is esterified and packaged into _____________ for transport to the ______________.

Mucosal, Chylomicrons, liver

Chylomicrons

Transport exogenous, i.e., dietary triglycerols and cholesterol from intestine to other tissues.

Lipoproteins (Classification)

according to density-chylomicrons, very low-density lipoprotein (VLDL), low-density lipoprotein (LDL), and high-density lipoprotein (HDL)

Which of the following cholesterol derivative is a polar steroid derivative?

bile salts

Convert from mg/dL to moles/L

by multiplying x 0.0259

Triglycerides

high triglyceride levels often appear with higher levels of total cholesterol and LDL cholesterol, and low levels of HDL cholesterol. Ideal triglyceride levels are considered to be less than 200 mg/dl.

What is the major component of HDL?

protein

How many Acetyl CoA are consumed in stage 1 of cholesterol biosynresis?

three

Blood test is used to measure

total blood cholesterol: 1. high density lipoprotein (HDL), 2. low density lipoprotein (LDL) cholesterol levels and triglycerides.

VLDL and LDL

transport endogenous lipids for example: synthesized in the body, triglyceol and cholesterol from liver to other tissues

HDL cholesterol

transports cholesterol back to the liver from other tissues. HDL cholesterol is also known as "good" cholesterol because a high levels seems to protect us against heart attacks by transporting cholesterol away from your arteries. On an average, men should have HDL levels ranging from 40 to 50 mg/dl, and women should have levels ranging 50 to 60 mg/dl. HDL cholesterol levels less than 35 mg/dl is considered low.