Figure 3 shows oxygen dissociation curves for haemoglobin at two different carbon dioxide concentrations.
Identify which curve shows the higher concentration of carbon dioxide and explain the advantage of this shift to respiring tissues.
Figure 3
From Mock A · Paper 1 (topics 1–4)
6.22 marks
Use Figure 3 to find the difference in percentage saturation between curves A and B at a partial pressure of 4 kPa.
From Mock A · Paper 1 (topics 1–4)
6.33 marks
Describe what happens to the atrioventricular and semilunar valves when the ventricles contract, and explain why.
From Mock A · Paper 1 (topics 1–4)
6.42 marks
Explain how tissue fluid is formed at the arteriole end of a capillary.
From Mock B · Paper 1 (topics 1–4)
14.36 marks
Describe and explain how the heart and blood vessels deliver absorbed amino acids from the ileum to working muscle cells.
From Mock C · Paper 1 (topics 1–4)
10.13 marks
A person has a heart rate of 70 beats per minute and a stroke volume of 75 cm³. Calculate the cardiac output in dm³ min⁻¹ and explain what it shows.
From Mock C · Paper 1 (topics 1–4)
10.23 marks
Explain the Bohr effect and its advantage during exercise.
From Mock C · Paper 3 (all topics, practical skills and essay)
3.13 marks
During a heart dissection, describe how you would show that the left ventricle wall is thicker than the right, and explain why.
Score 0 / 25 · 0 of 8 marked
This paper is written by Plasmo in the style of the AQA A-Level Biology exam. It is not a past paper and is not produced or endorsed by the exam board.
Mass transport in animals Exam Questions: AQA A-Level Biology | Plasmo