hao
Forum Newbie
Topics: 2
Posts: 12
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Hi all, this is a tough question, answer is C but I do not understand it completely, anyone?
Thanks
Which one of the following statements concerning expiration is correct?
a. At lung volumes close to VC, expiratory air flow is independent of expiratory effort
b. At lung volumes close VC, airway resistance is at its peak
c. At lung volumes close VC, expiratory air flow increases with increasing pleural pressures
d. At 50% of VC, increased expiratory effort results in decreased airway resistance
e. At lung volumes close to residual volume, the elastic recoil of the chest wall is directed inward
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| GOGETA
Trying to get in PGY1
Topics: 381
Posts: 3,072
| | 07/05/08 - 08:00 AM
1 of 1 forum leaders found this post helpful
| #2 |
When you breath out= expiration you need to make the preassure inside of your lungs higher than the one that is in the atmosphere.
So The pleural preassure will increase.
For example
Take a deep breath a really deep breath and hold it in. You feel how your chest wants to explote and is because the pleural preassure increase so when you go into expiration the air can go out in a passive way, unless you are having something going on like asthma.
As this little expiremnt you have notice that with the increasing pleaural preassure your expiratory air flow will increase.
Have in mind I MIGHT BE WRONGGGGGm this is based on what I remember form step1
Now let me go back to my books
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