What are pulmonary alveolar macrophages?
An alveolar macrophage, pulmonary macrophage, (or dust cell) is a type of macrophage, a professional phagocyte, found in the airways and at the level of the alveoli in the lungs, but separated from their walls.
What is the function of the alveolar macrophages?
Alveolar macrophages are critical for tissue homeostasis, host defense, clearance of surfactant and cell debris, pathogen recognition, initiation and resolution of lung inflammation, and repair of damaged tissue (10).
What is the function of alveolar macrophages quizlet?
What is the function of Alveolar Macrophages? Responsible for cleaning inhaled particles and lung surfactant.
What is the function of an alveolar macrophage and from where does it originate?
Alveolar macrophages are mononuclear phagocytes found in the alveoli of the lungs. They ingest small inhaled particles resulting in the degradation, clearance and presentation of the antigen to adaptive immune cells.
Do alveolar macrophages secrete pulmonary surfactant?
Pulmonary surfactant is a complex mixture of lipids, mostly phosphatidylcholine (PC), and associated proteins. Surfactant components are recycled by type II cells or catabolized by alveolar macrophages in a highly regulated system that maintains precise levels of pulmonary surfactant throughout life.
What is the function of alveolar macrophages found within and between alveoli?
Alveolar macrophages are the primary phagocytes of the innate immune system, clearing the air spaces of infectious, toxic, or allergic particles that have evaded the mechanical defenses of the respiratory tract, such as the nasal passages, the glottis, and the mucociliary transport system.
What are the alveolar cells?
The alveolar epithelium comprises two main cell types: the alveolar type I and alveolar type II cell. The type I cell is a complex branched cell with multiple cytoplasmic plates that are greatly attenuated and relatively devoid of organelles; these plates represent the gas exchange surface in the alveolus.
What are the three regions of the pharynx and their functions?
The pharynx is divided into three regions: the nasopharynx, the oropharynx, and the laryngopharynx. The nasopharynx is flanked by the conchae of the nasal cavity, and it serves only as an airway. At the top of the nasopharynx are the pharyngeal tonsils.
What is the function of the Conchae in the nasal cavity quizlet?
What is the function of the nasal conchae? The nasal cavity is divided in two by a bone and a cartilage mucous-lined septum. The nasal conchae increases the cavity’s surface area and creates air turbulence to filter, warm or cool, and humidify the air.