Table of Contents
- 1 What is the role of surfactant in alveoli?
- 2 What is the role of pulmonary surfactant in the lungs?
- 3 What is the role of surfactant in the respiratory system quizlet?
- 4 Which of the following is the function of surfactant in the alveoli of the lungs quizlet?
- 5 What cells make up the alveolar side of the alveolar capillary membrane?
- 6 What is the function of surfactant on the inner surfaces?
What is the role of surfactant in alveoli?
Pulmonary surfactant is essential for life as it lines the alveoli to lower surface tension, thereby preventing atelectasis during breathing. The hydrophobic proteins, SP-B and SP-C, together with dipalmitoylphosphatidylcholine, confer surface tension-lowering properties to the material.
What is the role of pulmonary surfactant in the lungs?
Pulmonary surfactant is a mixture of lipids and proteins which is secreted by the epithelial type II cells into the alveolar space. Its main function is to reduce the surface tension at the air/liquid interface in the lung. Surfactant protein A (SP-A) appears to promote most of SP-B’s functions.
What is the role of surfactant in gas exchange?
Surfactant is an agent that decreases the surface tension between two media. The pulmonary surfactant is produced by the alveolar type-II (AT-II) cells of the lungs. It is essential for efficient exchange of gases and for maintaining the structural integrity of alveoli.
Why is surfactant important?
The main function of surfactant is to lower the surface tension at the air/liquid interface within the alveoli of the lung. This is needed to lower the work of breathing and to prevent alveolar collapse at end-expiration.
What is the role of surfactant in the respiratory system quizlet?
The function of surfactant is to: trap foreign particles as they enter the bronchial tree. prevent each alveolus from collapsing as air moves in and out during respiration.
Which of the following is the function of surfactant in the alveoli of the lungs quizlet?
Surfactant reduces surface tension throughout the lung. It is also important because it stabilizes the alveoli. That is, at a constant surface tension, small alveoli will generate bigger pressures within them than will large alveoli.
What is alveolar surface tension?
The term surface tension refers to the cohesive state that occurs at a liquid-gas interface or liquid-liquid interface. 35. Within the lungs, this occurs at the interface between the alveolar membrane and the airway. Increased surface tension increases cohesion within the alveoli, pulling the alveoli closed.
What type of alveolar cells produce surfactant quizlet?
Surfactant is a complex substance containing phospholipids and a number of apoproteins. This fluid is produced by the Type II alveolar cells, and lines the alveoli and smallest bronchioles.
What cells make up the alveolar side of the alveolar capillary membrane?
The alveolar capillary membrane (ACM) is composed of alveolar epithelial cells that share a basement membrane, and at times fuse with microvascular endothelial cells. The alveolar epithelium is composed of alveolar epithelial type 1 (T1) and type 2 (T2) cells.
What is the function of surfactant on the inner surfaces?
Surfactant-specific proteins facilitate the arrangement of phospholipids in the lining layer, thereby optimizing surface-tension-reducing capacity. This important function prevents alveolar and airway collapse at end-expiration and thus allows cyclic ventilation of the lungs.
Why is surfactant in alveolar fluid important quizlet?
What is the purpose of surfactant that lines each alveolus quizlet?