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3.3 Organisms exchange substances with their environment
Quick questions on Haemoglobin, the oxygen dissociation curve and the cardiac cycle - AQA A-Level Biology 3.3
3short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is q1?Show answer
Explain why the oxygen dissociation curve for haemoglobin is S-shaped. [3 marks]
What is q2?Show answer
During ventricular systole, explain why the atrioventricular valves close but the semilunar valves open. [3 marks]
What is q3?Show answer
A high-altitude bird has haemoglobin with a dissociation curve to the left of a lowland bird's. Explain the advantage. [3 marks]
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