- Messages
- 924
- Reaction score
- 1,096
- Points
- 153
I tried to look at the MS and write an answer <.<
http://freeexampapers.com/A-Level/Biology/CIE/2010-Nov/9700_w10_qp_21.pdf
question 3 part c
Hows this?
At high altitude pCO2 would be lower than at seas level which means that Hb would be less saturated.If haematrocrists increase whihc is more number of RBCs
the RBCs can compensate for the low pO2.
http://freeexampapers.com/A-Level/Biology/CIE/2010-Nov/9700_w10_qp_22.pdf
question 6 part d
The gases diffuse down the concentration gradient. In the pulmonary artery the pO2 i slower than in the alveolous in the alveolus it is 13.87 kPa. This oxygen diffuses into teh blood from the alveolus.When the artery that carries oxygen rich blood reaches near the respiring tissue there the pCO2 in capillary network is low at the arteriol end.Thus CO2 diffuses out of the tisues and into the blood.
Question 3 c says: "Describe the role of haemoglobin in the transport of oxygen and carbon dioxide."
You seem to be answering a different question
Question 6: A few grammatical mistakes but your answer seems good to me. However, it seems like you have made three points, whilst the question has 4 marks. The mark scheme shows the first general statement you made as one mark. Next, you made one statement for each table, so you got two from that.
Each table has two rows ( 2 marks) so you could have made two more points. (or one would've been enough)