Metabolic pathways: lipid catabolism Flashcards
1
Q
Three reasons why fat is required
A
- As an energy source
- For essential fatty acids
- For fat-soluble vitamins
2
Q
What does triglyceride consist of?
A
Glycerol and three fatty acids
3
Q
What are the main products of fat digestion?
A
- Glycerol
- Fatty acids
- Mono glycerides
4
Q
What enzyme attacks and cleaves chylomicrons at muscle and adipose tissue?
A
Lipoprotein lipase
5
Q
What happens to free fatty acids in adipose tissue and muscle?
A
In adipose tissue: resynthesized into triacylglycerols, for storage
In muscle: oxidised to provide energy
6
Q
What is Lipolysis?
A
Breakdown of lipids
7
Q
What enzymes initially cleaves the stored fat in adipose tissue?
A
Hormone sensitive lipases (e.g. adrenaline sensitive)
8
Q
What are the products of each Beta oxidation cycle?
A
1 acetyl-CoA
1 FADH2
1 NADH + H+
1 fatty acyl-CoA, shortened by 2 carbon atoms
