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10 Cards in this Set
- Front
- Back
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what is the vestibule and what kind of epithelia line it? what about the respiratory segment of the nasal cavity?
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stratified squamous, and it's the beginning of the nose. expect skin.
the respiratory part has respiratory epithelium - pseudostratified columnar ciliated epi. |
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what are the two big divisions of the respiratory system?
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conducting and respiratory. conducting goes all the way to the level of the terminal bronchioles, then the respiratory section starts
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what are the 5 cell types of the respiratory segment?
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CBGBs
Ciliated columnar cells Brush cells - cells with short, brunt microvili Goblet cells (mucous) Basal cells - stem cells that give rise to all the rest note that the lamina propria here is highly vascularized and full of sebaceous secreters and gets inflamed during colds note that brush cells are specialized for transmitting normal general sensation. |
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how is olfactory epithelium different? what about on slides?
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Lined with special olfactory mucosa. The lamina propria here is much different.
No goblet cells in the epithelia. Olfactory cells are bipolar neurons olfactory glands (bowmman's) supporting cells (aka sustentacular) have normal basal and brush cells. on slides, it looks like it has a much larger lamina propria The epithelium itself is much thicker. |
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what's a difference in the larynx and pharynx we should know about?
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they both can have stratified squamous instead of pseudostratified columnar (normal respiratory epi)
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what is metaplasia in the respiratory system?
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Chronic coughing, whether from smoking of bronchitis, causes a remake of the normal pseudostratified columnar into stratified squamous.
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tell me about type 1 and type 2 pneumocytes
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type 1 are the main makup of alveolar walls and are squamous cells.
type 2 are cuboidal and and make surfactant. note that type 2's make surfactant |
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what's a heart failure cell?
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an alveolar macrophage that has lots of phagocytosed red blood cells. Full of hemosiderin.
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describe the blood air barrier
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at the thinnest part, there's a layer of surfactant, a type I epithelial cell (and its basal lamina), and a capillary's endothelial cell (and its basal lamina) across which air must transmit.
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what causes emphysema microscopically?
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dissolving of ELASTIN by elastase, and ALPHA 1 Anti Trypsin Deficiency.
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