OCR A Level Biology A
OCR A Level Biology A Transport in Animals Exam Questions
Free OCR A Level Biology A exam questions on Transport in Animals, with mark schemes. Covers circulatory systems, blood vessels, the heart, the cardiac cycle and haemoglobin.
Transport in Animals exam questions
1 question pack of real past exam questions with its mark scheme. Answer every question without notes, then mark your answers line by line against the mark scheme.
StemUp mark scheme flashcards
OCR A Level Biology A H420 Flashcards (Anki & Quizlet)
Every answer is written in mark scheme wording, so you learn exactly what examiners give marks for. Use them on Anki or Quizlet, then test yourself with the questions on this page.
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About OCR A Level Biology A Transport in Animals
This topic covers mammalian transport.
What you need to know
- Circulatory systems Open, closed, single and double circulation.
- Blood vessels Arteries, veins, capillaries and tissue fluid formation.
- The heart Structure, cardiac cycle, SAN, AVN and ECGs.
- Haemoglobin Oxygen dissociation curves and the Bohr effect.
Common mistakes in Transport in Animals
- Saying arteries always carry oxygenated blood.
- Misreading the cardiac cycle pressure graph.
- Forgetting the Bohr shift is to the right.
Try three Transport in Animals exam-style questions
1. Explain the Bohr effect. (2 marks)
Show the mark scheme answer
Higher CO₂ lowers haemoglobin's affinity for oxygen (1), so more oxygen is released to respiring tissues (1).
2. State the role of the AVN. (1 mark)
Show the mark scheme answer
Delays the impulse so the atria empty before the ventricles contract.
3. Explain how tissue fluid forms. (2 marks)
Show the mark scheme answer
High hydrostatic pressure at the arteriole end (1) forces fluid out of capillaries (1).
Transport in Animals FAQs
What does Transport in Animals cover?
Circulation, vessels, the heart and haemoglobin.
Which practical links here?
Heart dissection.
What is fetal haemoglobin?
Haemoglobin with higher oxygen affinity than adult haemoglobin.
Revise this topic with flashcards: OCR A Level Biology A H420 Flashcards, with mark scheme answers for Anki and Quizlet.
