How much oxygen is released by Hemoglobin per 100ml blood

Question

Red blood cells carry oxygen from lungs to the whole body. The percent saturation of hemoglobin with oxygen depends on the partial pressure of oxygen. Higher partial pressure of oxygen means more hemoglobin can carry more oxygen, while lower partial pressure of oxygen means hemoglobin releases oxygen. The relationship is shown in the graph. Partial pressure of oxygen

In lungs = $$\ce{11 kPa}$$,
in muscles = $$\ce{2 kPa}$$

100% oxygen saturated hemoglobin carries: $$\ce{20 mL oxygen/100 mL blood}$$. While going to muscles from lungs, what is the amount of oxygen (in mL) released by hemoglobin per $$\pu{100 mL}$$ blood? Write it as an integer.

My progress

So, it seemed like too easy question to me.

As the graph says, Saturation of Hemoglobin with Oxygen is 100% when partial pressure of oxygen is $$\pu{14 kPa}$$ So, at $$\pu{14 kPa}$$ it carries $$\ce{20 mL oxygen/100 mL blood}$$

With this information, it can be said that at $$\pu{11 kPa}$$ and $$\pu{2 kPa}$$ it will carry $$\pu{15.71 ml}$$ and $$\pu{2.85 ml}$$ respectively.

Which are actually the amount of oxygen carried in lungs and muscles. So, while going to muscles from lungs, it should release

$$\ce{15.71 - 2.85 = 12.86 ≈ 13 ml}$$

So, $$\pu{13 ml/ 100ml of blood}$$

But I have confusion if this is correct reading this part

Higher partial pressure of oxygen means more hemoglobin can carry more oxygen, while lower partial pressure of oxygen means hemoglobin releases oxygen.

I am confused, if the way I found the difference is proper

So, I am not sure if that was the correct way. Is it the correct procedure ?

• If you can solve this problem, why are you posting here? Don't you have an instructor to mark your work? This is a biology question and answer site, not a homework checking site. Jul 27 at 12:01
• I’m voting to close this question because the question appears to be an attempt to use the site as a homework checking service. Jul 27 at 12:01
• I don't have any tutor to check and I am practicing a olympiad questions which answers are never given. People here ask for efforts to add so I added how I progressed. But when I have done this, people are closing it. How funny Jul 27 at 14:02
• Your calculations are wrong and you don't seem to be using the values from the graph. For example, the graph does not show the hemoglobin 100% saturated at 14 kPa. Jul 27 at 14:21
• I think this question demonstrates the sort of effort required under our homework policy; they've shown their work towards an answer. I am also, however, a bit concerned with this site being used as an "answer checker" service when answers are not provided, even if work is shown. Questions should be asked in ways that are useful to others. Jul 27 at 15:22