Lipids

By definition, lipids are hydrophobic molecules. This means they ....

• are water soluble

• do not readily mix with water

• readily form hydrogen bonds with water

Answer explanation

Consider the root words.

"hydro" means water

"phobic" mean fear

Reorder the following from lowest to highest saturated fat content (as a % of total fatty acids)

• olive oil

• butter

• chicken fat

• coconut fat

Answer explanation

Consider the physical state at room temperature. The more saturated a fat is, the more solid is is at room temperature.

Match the following

• no double bonds

• monounsaturated fatty acid

• at least 2 double bonds

• polyunsaturated fat

• 1 double bond

• saturated fatty acid

Cholesterol is NOT an essential nutrient. This is because ...

• our body can make all that we need

• it contains no energy

• it is widely available in the diet

Match the food with the predominant type of fatty acid.

• sunflower oil

• saturated fatty acids

• cream

• polyunsaturated fatty acids

• avocado

• monounsaturated fatty acids

Food manufacturers add phospholipids to some packaged foods to .....

• thicken the food

• prevent separation of hydrophobic and hydrophilic ingredients

• improve flavour

• improve nutritional value

Atherosclerosis results in ...

• narrowing of the arteries

• buildup of fatty material in the artery walls

• increased blood pressure within arteries

• all of the these are correct

Which statement is TRUE ?

• Saturated fats have lots of double bonds in the carbon chain

• Saturated fats stay solid at room temperature

• Saturated fats are healthier than unsaturated fats

Which statement re HDL-cholesterol and LDL-cholesterol is TRUE?

• High blood levels of LDL-cholesterol are associated with high risk of CHD

• High blood levels of HDL-cholesterol are associated with high risk of CHD

• Health professionals recommend we lower consumption of LDL-cholesterol

Match the following

• used to make many hormones

• lipoprotein

• forms a bilayer in cell membranes

• triglyceride

• contains 3 fatty acids

• phospholipid

• particle for transporting lipids around the body

• cholesterol