Bookmark and Share

Front Back
Describe the composition of lipids
Lipids contain few oxygen atoms, they are mainly composed of carbon and hydrogen
Lipids are hydrophobic molecules and are mostly non-polar
The role of lipids in the body
Lipids make up approx. 20% of the body, but this varies greatly between individuals.
The roles of lipids in the body include:
  • Source of energy
  • Storage of energy, in adipose tissue - oinsulates the body
  • Basic componants of cell membrane (i.e phospholipids)
  • Chemical messengers, steroid hormones - such as oestrogen, testosterone, aldostrone...
Describe the composition of triglycerides and its importance in the body
Fat storage molecule - Composed of glycerol, and three fatty acids. Triglycerides are the main lipid storing molecule in our body; lipids stored in adipose tissue
Describe the composition of phospholipids and its importance in the body
aka Glycerophospohlipids - are the most abundant lipids in cell membranes.
They are composed of glycerol, two fatty acids, a phosphate group and a small polar molecule (e.g. amino acid or small sugar)
Describe steriods and their various roles in the body
A steriod consists of a characteristic 4 ring structure
Cholesterol is the most abundant steroid in the body
Sex hormones - oestrogen in females and testtosterone in males
Corticoid hormones - adrenal hormones produced in the adrenal gland
x of y cards