The Are Paired Organs Containing Alveoli Which Permit – Flashcards

The alveolar epithelium consists primarily of _______________.

The alveolar epithelium consists primarily of simple squamous epithelium.

The squamous epithelial cells, called pneumocytes _____, are unusually thin and delicate.

The alveolar epithelium consists primarily of simple squamous epithelium.

The squamous epithelial cells, called pneumocytes _____, are unusually thin and delicate.

The large pneumocytes type II cells produce ______ , an oily secretion containing a mixture of
phospholipids and proteins.

________ is secreted onto the alveolar surfaces, where it forms a superficial coating over a
thin layer of water.

Decrease surface tension and helps expansion of alveolus.

If pneumocytes type II produce inadequate amounts of surfactant due to injury or genetic abnormalities, _____________, and respiration will become difficult.

Roaming alveolar ___________ (dust cells) patrol the epithelial surface, phagocytizing any paniculate matter that has eluded other respiratory defenses and reached the alveolar surfaces.

A person who does not produce enough surfactant is soon exhausted by the effort required to keep inflating and deflating the lungs. This
condition is called __________________.

.

Gas exchange occurs across the ________ of the alveoli.

The ____________ is a composite structure consisting of three layers:

(1) the squamous epithelial cells lining the alveolus,
(2) the endothelial cells lining an adjacent capillary, and
(3) the fused basal laminae that lie between the alveolar and endothelial cells.

The respiratory membrane is a composite structure consisting of three layers:

(1) the endothelial cells lining an adjacent capillary (___________)

(2) the fused basal laminae that lie between the alveolar and endothelial cells(basement membrane - fused basal lamiae)

(3) the squamous epithelial cells lining the alveolus (alveolar epithelium)

The respiratory membrane is a composite structure consisting of three layers:

(1) the endothelial cells lining an adjacent capillary (capillary endothelium)

(2) the fused basal laminae that lie between the alveolar and endothelial cells(________)

(3) the squamous epithelial cells lining the alveolus (alveolar epithelium)

The respiratory membrane is a composite structure consisting of three layers:

(1) the endothelial cells lining an adjacent capillary (capillary endothelium)

(2) the fused basal laminae that lie between the alveolar and endothelial cells(basement membrane - fused basal lamiae)

(3) the squamous epithelial cells lining the alveolus (_________)

Develops from an infection or any other stimulus that causes inflammation of the lobules of the lung. As inflammation occurs, fluids leak into the alveoli and the respiratory bronchioles swell and constrict.

The most common pneumonia that develops in individuals with AIDS results from infection by the fungus ____________.

The respiratory defenses of healthy individuals are able to prevent infection and tissue damage, but the breakdown of those defenses in AIDS can result in a massive, potentially fatal lung infection