Lipids (fats)
- Created by: N1ntendo-Sw1tch
- Created on: 26-02-23 19:13
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- Lipids (fats)
- Functions
- Energy storage
- Gram for gram lipids provide more than double the amount of energy of carbohydrates
- Thermal insulation
- Adipose tissue under the skin helps reduce heat loss
- Protection
- adipose tissue around delicate organs such as the kidneys acts as a cusion against physical damage
- Energy storage
- Waxes
- similar to lipids but also contain alcohol
- forms waxy cuticle to reduce water loss in plants and insects
- structure (triglyceride) = glycerol and three fatty acids
- ester bonds between glycerol and fatty acids
- Formed by condensation and broken by hydrolysis
- saturated and unsaturated fats
- unsaturated has c=c
- saturated doesn't have c=c
- cholesterol and high/low density lipoproteins
- cholesterol is carried in the blood attached to lipoproteins because it is insoluble in water
- LDL or 'bad cholesterol' contain a high level of cholesterol and can lead to atheroma's that restrict blood flow in arteries and can cause heart disease /attack
- HDL or 'good cholesterol' contains less cholesterol and does not lead to atheroma's. it takes cholesterol to the liver to be broken down
- Phospholipids
- structure= glycerol, phosphate group and two fatty acids
- properties
- hydrophilic head due to negative charge in phosphate group
- Hydrophobic tails as they're uncharged
- functions = lipid bilayer (cell membrane and organelle membranes)
- Functions
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