In the model of the lesson a healthy adult has a respiratory surface of about 130 m²…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
In the model of the lesson a healthy adult has a respiratory surface of about m. A person with emphysema has lost per cent of it. Take the oxygen that can be taken up as proportional to the surface that is left.
- How much surface is left?
- What per cent of the normal oxygen uptake is possible?
Need a reminder? The key ideaShow
Asthma is the inflammation of the bronchi and bronchioles, with wheezing. Emphysema is the damage of the alveolar walls, a smaller respiratory surface, and smoking is a major cause. Dust in grinding and stone-breaking industries causes inflammation and fibrosis.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Given. Normal surface: m. Lost: .
Plan. The share left is per cent.
Step 1. Surface left. m.
Step 2. Uptake. The uptake is proportional to the surface, so it is of the normal.
Answer: m and of the normal uptake.
Check. , the share that is left.
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