cholesterol

Question 1

what are the main sources

Answer 1

body>liver
food>animal products (meat/poultry/dairy)
-saturated and tran fats means more made in liver

Question 2

functions?

Answer 2

cell membrane support
bile production for digestion and absorption
vitamin D production-when sun rays hit skin
hormone production-e.g. estrogen

Question 3

method of transport?

Answer 3

-in lipoproteins in the blood

Question 4

what are lipoproteins?

Answer 4

-sphere shaped assemblies, containing lipids and proteins that keep cholesterol separate from the blood

Question 5

what are the 2 types of cholesterol?

Answer 5

LDL and HDL

Question 6

what is LDL?

Answer 6

• low density lipoprotein
• more cholesterol than proteins
• ‘bad’>plaque that clogs arteries

Question 7

what is HDL?

Answer 7

• high density lipoprotein
• more protein than cholesterol
• ‘good’>removes LDL from arteries, carries to liver to be broken down and removed

Question 8

what is atherosclerosis?

Answer 8

• when a clot forms and blocks the artery which limits the flow of oxygenated blood to organs/body
• can cause heart attacks/stroke
• LDL level is higher than HDL

Question 9

how to control cholesterol?

Answer 9

• exercise
• eat healthy>limit trans/saturated fats
• lose excess weight
• sterol supplements

Question 10

what is cholesterol?

Answer 10

• organic molecule
• makes steroid hormones
• found in body tissues
• lipid (fat)
• is biosynthesised
• important for cell membrane
• candle shavings