Energy Production In Lipids Flashcards Preview

Phase 1 - S2 Metabolism, Endocrinology, Haematology > Energy Production In Lipids > Flashcards

Flashcards in Energy Production In Lipids Deck (64)
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1

True or false: lipids are hydrophilic

False - they're hydrophobic

2

Are lipids soluble in water?

No

3

True or False: Lipids are more reduced than carbohydrates

True. This means they release more energy when oxidised

4

True or false: complete oxidation of lipids requires more oxygen than carbohydrates

True - lipids are more reduced than carbohydrates

5

Give 3 examples of fatty acids derivatives

1.fatty acids
2. Triacylglycerols
3. Phospholipids

6

Give 3 examples of Hydroxy-methyl-glutaric acid derivatives

1. Ketone bodies
2. Cholesterol
3. Bile acids and salts

7

Give 4 examples of lipid soluble vitamins

A, D, E and K

8

What are fatty acids stored as

Triacylglycerols

9

Where do you get lipid soluble vitamins from

Diet

10

What are triacylglycerols made up of

3 carbon glycerol backbone and 3 fatty acid side chains

11

What process produces triacylglycerols

Esterification

12

What process breaks down triacylglycerols

Lipolysis

13

Are triacylglycerols hydrophobic or hydrophilic

Hydrophobic

14

Where are triacylglycerols stored

Adipose tissue

15

How are triacylglycerols stored?

In an anhydrous form of lipid droplets

16

What hormone mobilises fat

Glucagon

17

What hormone causes the storage of fat

Insulin

18

What are chylomicrons

Lipoprotein particles that transport triglycerides in the blood via the lymphatics to adipose tissue

19

What hydrolyses lipids in the pancreas

Pancreatic lipases

20

How are fatty acids transported from storage in adipose tissue to consumer tissue

Albumin fatty acids complexes

21

What happens to fatty acids in consumer tissues

Oxidised to produce energy

22

In which cells does metabolism of fatty acids not occur

1. RBC as they have no mitochondria
2. Brain as fatty acids cant pass through the blood brain barrier

23

What does a low glucose level do to fatty acids stores in adipose tissue

Releases it to be used as an alternative fuel

24

What does it mean if fats are saturated and unsaturated

- saturated = no double bonds
- unsaturated = one or more double bonds

25

What does amphipathic mean

Contains both hydrophobic and hydrophilic groups

26

Why are some polyunsaturated fatty acids essential

Mammals cant make a double bond beyond carbon 9

27

Where does fatty acid metabolism occur

Mitochondria

28

How are fatty acids activated in their metabolism

By linking them to coenzyme A outside the mitochondria

29

What transports the activated fatty acids across the inner mitochondrial membrane

Carnitine shuttle

30

What enzyme activates fatty acids

Fatty acyl CoA synthase