These are approximate readings of the normal curve…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
These are approximate readings of the normal curve.
- At mm Hg: per cent.
- At mm Hg: per cent.
- At mm Hg: per cent.
- At mm Hg: per cent.
- At mm Hg: per cent.
- At mm Hg: per cent.
- By how many per cent points does the saturation rise when the pO goes from to mm Hg?
- By how many per cent points does it rise when the pO goes from to mm Hg?
- What does this tell you about the shape of the curve?
Need a reminder? The key ideaShow
The oxygen dissociation curve is S-shaped. At mm Hg haemoglobin is about per cent saturated, and at mm Hg about per cent. A higher pCO, more hydrogen ions or a higher temperature shift it to the right, and oxygen is released more easily.
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. The table.
Plan. Subtract the two saturations for each pair.
Step 1. (a) points.
Step 2. (b) points.
Step 3. (c) The curve is steep at low pO and almost flat at high pO. It is S-shaped.
Answer: points, points. The curve is steep and then flat.
Check. The range in (b) is longer, but the rise is much smaller. That is what a flat part means.
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