The lipids are a large and diverse group of naturally occurring organic compounds that are related by their solubility in nonpolar organic solvents (e.g. ether, chloroform, acetone & benzene) and general insolubility in water.hospholipids are the main constituents of cell membranes. They resemble the triglycerides in being ester or amide derivatives of glycerol or sphingosine with fatty acids and phosphoric acid.
What causes lung nodules? Quick Answer. According to the Seattle Cancer Care Alliance, lung, or pulmonary, nodules have numerous causes, including fungal or bacterial infection, sarcoidosis, lymphoma, lung cancer and cancers metastasized from other organs.
A. A lung nodule is a small, solid abnormality in the lung. Nodules are most commonly detected on a chest X-ray or CT scan. There are many causes of nodules. Depending on the cause, a nodule may have no importance or it may represent a serious disease. Some of the most common causes of lung nodules include: 1  Scar tissue. lung nodule is a small, solid abnormality in the lung. Nodules are most commonly detected on a chest X-ray or CT scan. There are many causes of nodules.