Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
11 Cards in this Set
- Front
- Back
|
what protects the membranes of the airways?
|
mucin layer, because of turbulent flow it is almost certain that particles will contact the mucus at some point.
|
|
|
what is a ciliated cell?
|
specialized cell, sweeps mucin blobs out of airway. cough and sneeze help remove lare particles or excess mucus.
|
|
|
what immunoglobulin is present in mucus?
|
secretory IgA sIgA
|
|
|
What are the defenses of the eyes nasopharynx lungs?
|
eyes- blinking, tears, lysozyme, sIgA, lactoferrin
NP- resident microflora, lysozyme, sIgA, lactoferrin, phags Lungs- Macrophages |
|
|
why are liquid aerosols more frequently associated with the spread of lung infections.
|
they are small and succeed in bypassing the defenses of the upper respiratory tract. and they tend to remain suspended in air longer.(no easy inexpensive way to clean)
|
|
|
what is probably the best way to disinfect air?
|
UV lights ( careful with the eyes)
|
|
|
whats the best way to prevent transmission of airborne diseases?
|
prevent aerosol formation. cover your freakin mouth when you sneeze.
eliminate crowded conditions that increase risk of inhaling |
|
|
what is the lungs 2nd line of defense (first is airway defenses)
|
alveolar macrophages. during infection neutrophils, NKC, and cytoxic T cells ( kill pathogens that macrophages cant) also enter area.
|
|
|
What are activated macrophages for?
|
they kill bacterial or fungal pathogens that cannot be killed by normal macrophages.
|
|
|
when do granulomatous form?
|
if phag cells cannont eliminate an invader. they wall it off with fibrin. these granulomatous eventually calcify.
|
|
|
how do resident microbiota help protect you?
|
the normal non-pathogenic bacteria occupies space and prevents the pathogens from colonizing the area.
|
