Lecture 3.2: Energy Production from Lipids

Question 1

Brown Adipose Tissue

Answer 1

Found in newborns and infants

To keep heat around vital organs

Question 2

What are lipids?

Answer 2

Generally insoluble in water (hydrophobic)

Most contain only C, H and some O

More ‘reduced’ than carbohydrates so they:
– release more energy when oxidised
– complete oxidation requires more O2

Question 3

Classes of Lipids (3)

Answer 3

Fatty acid derivatives

Hydroxy-methyl-glutaric acid (HMG) derivatives (C6 compound)

Vitamins

Question 4

Classes of Lipids: Fatty acid derivatives

Answer 4

Fatty Acids

Triacylglycerols (Triglycerides)

Phospholipids

Eicosanoids

Question 5

Classes of Lipids: Hydroxy-methyl-glutaric acid (HMG) derivatives

Answer 5

Ketone Bodies (C4): hydrophilic

Cholesterol (C27)

Cholesterol Esters

Bile Acids and Salts (C24)

Question 6

Classes of Lipids: Vitamins

Answer 6

A, K, E and D