Which of the following is the main component of surfactant, secreted by alveolar epithelial cells?
One of the above
Ans. B. Phospholipids
- Nearly 77% of the surfactant is composed of phospholipids.
- A phospholipid is made up of two fatty acid tails and a phosphate group head.
- Fatty acids are long chains that are mostly made up of hydrogen and carbon, while phosphate groups consist of a phosphorus molecule with four oxygen molecules attached.
- These two components of the phospholipid are connected via a third molecule, glycerol.