Pulmonary surfactant is a surface-active lipoprotein complex (phospholipoprotein) formed by type II alveolar cells. The proteins and lipids that make up the surfactant have both hydrophilic and hydrophobic regions.
Antibody deficiencies, also called immunoglobulin deficiency syndromes, are immune system disorders that are characterized by low or absent levels of immunoglobulin in the blood.Immunoglobulins (Ig) are antibodies that play an essential role in the body's immune system.he antibodies are present in the bloodstream or bound to the outer surfaces of B-cells or plasma cells. There are five classes of immunoglobulins: IgA, IgD, IgE, IgG, and IgM. Patients who have antibody deficiencies may have reduced or absent levels of one or more types of immunoglobulin.
Primary immune deficiency (PID) is the name given to chronic illnesses caused by hereditary or genetic defects in the immune system.There are over 150 forms of PID. Some are mild, some are severe. The immune system protects our bodies from germs such as bacteria and viruses that cause infections.rimary immune deficiency (PID) is the name given to chronic illnesses caused by hereditary or genetic defects in the immune system.