00:01
Okay, this question here says, determine if each characteristic is increased or decreased in someone who suffers from emphysema.
00:07
And you have here decreased in emphysema, then you have increased in emphysema, or does not change.
00:16
And you have the following options.
00:18
You have the size of alveoli, you have if or needed to ventilate total lung capacity, the tidal volume, the expiratory reserve volume, the number of alveoli, and the lung elasticity.
00:31
So first for the size of the alveoli.
00:33
In case of, remember that in emphysema, what happens is that there is distraction of elastic tissue because of elastasis, okay? so remember that all of this part here is made of elastic tissue.
00:45
And even there is a force that is called radial traction, radial traction, that is a practically a traction that is going to maintain your, these tubes here open when you're exhaling.
01:02
So when you're exhaling, your airways are going to narrow in order to move the air like upwards, okay? so what happens if there is distraction of elastic tissue, then it means that your radial traction is gonna be decreased.
01:22
So practically, it is not going to be able to keep your airways open during exhalation.
01:28
So in this case, what is gonna happen? your air is going to retain here.
01:32
And as your air retains, your alveoli is gonna increase also, okay? so in this case, the size of alveoli is gonna be here, size of alveoli, okay? then you have that effort needed to ventilate.
01:48
And in this case, the effort is also, oh, sorry, the size of alveoli is increased, i said.
01:54
So it is here, the size, okay? now, regarding the effort needed to ventilate is gonna be also here, okay? because if you breathe like fast, then this is gonna happen.
02:08
But if you breathe like slower, then you're not going to collapse your airways too much, and air can be exhaled, okay? but anyway, the effort needed to ventilate is gonna be increased.
02:21
Then you have the total lung capacity...