Laboromniavincit
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#1
Report Thread starter 1 year ago
#1
What is surfactant and what is it’s role in gas exchange
Doing ocr as biology
Please help
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app_
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#2
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#2
A liquid type substance that coats the alveoli in the lungs - it evaporates as we breath out
To prevent alveoli collapsing due to cohesive forces of water
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Laboromniavincit
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#3
Report Thread starter 1 year ago
#3
(Original post by app_)
A liquid type substance that coats the alveoli in the lungs - it evaporates as we breath out
To prevent alveoli collapsing due to cohesive forces of water
You got to help me out with other queries please
exchange and transport topic is killing me
i want to enjoy learning this topic
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app_
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#4
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#4
ahaha. go for it, what other q's do you have?
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Laboromniavincit
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#5
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#5
Lung volume
Help
Any easy way to remember
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app_
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#6
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#6
tidal vol = vol displaced per breath (think of it like the ocean waves coming in & out at regular intervals)
vital capacity = total air the can be moved by the lungs (I remember it bc it says capacity)
residual vol = remaining vol of air after forced expiration (residual = residue = remaining)

total lung vol = VC+ RV
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macpatgh-Sheldon
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#7
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#7
As "software package" = app :confused: says, surfactant reduces the surface tension of the aqueous (= of water) film over the alveoli, and thus helps keep them inflated. During foetal life, surfactant can only be produced very late in the third trimester, so in babies born very prematurely, it may be absent or scanty, resulting in infantile respiratory distress syndrome. In such cases. the neonate (= newborn baby) will need to be kept in an incubator and supported with oxygen therapy and other measures.

M.
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