In general, there are three stages leading from iron deficiency to anemia: 1  First, there is an insufficient supply of iron, which causes iron stores in the bone marrow to be depleted. This stage generally has no symptoms. 2  Second, iron deficiencies develop and begin to affect hemoglobin production.
Surfactant immune function is primarily attributed to two proteins: SP-A and SP-D. These proteins can bind to sugars on the surface of pathogens and thereby opsonize them for uptake by phagocytes. It also regulates inflammatory responses and interacts with the adaptive immune response.
â¢The purpose of talk is to examine: â The effects that surfactants have upon: â¢Drainage and imbibition of water in the unsaturated. zone. â To understand the effects that surfactants have upon water. retention we need to understand how surfactants alter the. surface tension of water in soil water systems; and. â How surfactants, through adsorption, alter wetting. properties.