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True or false the fluid coating the alveoli that reduces surface tension is called surfactant?
True; produced by Type II pneumocytes
What are the major organ tissues and cells for the respiratory system?
The respiratory system is made of the conducting airways (bronchi, bronchioles, etc.) and the alveoli (air sacs). Alveloi are lined with two major cell types: type I pneumocytes, which are broad and flat and mediate gas exchange, and type II pneumocytes, which 1) make surfactant to keep the alveoli from collapsing and 2) serve as stem cells to regenerate type I pneumocytes after injury.
What is the function of type 2 alveoli walls?
function of type 2 alveoli cells is to secrete surfactant.
What produces surfactant?
type II alveolar cells
What keep the alveoli from collapsing?
Alveoli does not collapse because lungs always have a residual volume which prevents the alveoli to collapse.
What cells secrete surfactant that reduces the tendency for pulmonary alveoli to collapse?
Type 2 Alveolar cells
What are essential cells of the lung performing its main function are the pulmonary?
The essential cells of the lung that perform its main function are the alveolar cells, including type 1 pneumocytes for gas exchange and type 2 pneumocytes for surfactant production. Other important cells include macrophages for immune defense and ciliated epithelial cells for airway clearance.
What is a phosphlolipid that lowers the surface tension of the alveoli preventing them from collapsing?
The Great (Type 2) Alveolar cells secrete pulmonary surfactant and prevent the cells from collasping.
Alveoli have neither smooth muscle or mucous secreting cells?
That is correct. Alveoli only contain only two types of cells: Type I cells that are like thin sheets and make up the actually wall of the alveoli, and Type II cells that secrete a substance called surfactant that helps to hold the alveoli open. There can also be some macrophages present in the alveoli to destroy invading bacteria.
Why is there no smooth muscle present in the alveolar wall for support?
It is the elasticity that keep alveolus in shape. However if it is deflated , surfactant avoid the alveolus from sticking to each other. Smooth muscle greatly hinder the efficiency of gas exchange as it thicken the diffusion surface. The alveoli consist of an epithelial layer and extracellular matrix surrounded by capillaries. In some The alveoli consist of an epithelial layer and extracellular matrix surrounded by capillaries. In some alveolar walls there are pores between alveoli called pores of Kohn. There are three major alveolar cell types in the alveolar wall (pneumocytes): * Type I (Squamous Alveolar) cells that form the structure of an alveolar wall * Type II (Great Alveolar) cells that secrete pulmonary surfactant to lower the surface tension of water and allows the membrane to separate, thereby increasing the capability to exchange gases. Surfactant is continuously released by exocytosis. It forms an underlying aqueous protein-containing hypophase and an overlying phospholipid film composed primarily of dipalmitoyl phosphatidylcholine. * Macrophages that destroy foreign material, such as bacteria.
What is the scientific name for lung cells?
Pneumocyte. There are two types: Type I cells make up the lining of the air sacks (alveoli) in the lung, type II cells produce a slick liquid called surfactant that helps coat the alveoli and keep them from collapsing when we exhale.
What do Type 2 alveolar cells secrete?
secrete surfactant
