OCR A Level Biology B (Advancing Biology)
OCR A Level Biology B (Advancing Biology) Transport Systems in Mammals Exam Questions
Free OCR A Level Biology B (Advancing Biology) exam questions on Transport Systems in Mammals, with mark schemes. Covers blood vessels, blood, tissue fluid, haemoglobin and the double circulation.
Transport Systems in Mammals 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
A Level Biology Flashcards
Every answer is written in mark scheme wording, so you learn exactly what examiners give marks for. Pick your exam board, then test yourself with the questions on this page.
View flashcards
About OCR A Level Biology B (Advancing Biology) Transport Systems in Mammals
This topic covers how mammals transport substances.
What you need to know
- Vessels Arteries, veins and capillaries.
- Blood Plasma, red and white cells and platelets.
- Tissue fluid Formation and return via lymph.
- Haemoglobin Oxygen dissociation and the Bohr effect.
Common mistakes in Transport Systems in Mammals
- Saying veins have thicker walls.
- Forgetting lymph returns tissue fluid.
- Misplacing the Bohr curve shift.
Try three Transport Systems in Mammals exam-style questions
1. Explain why capillaries are suited to exchange. (2 marks)
Show the mark scheme answer
Walls are one cell thick (1) and they have a large total surface area (1).
2. State one adaptation of veins. (1 mark)
Show the mark scheme answer
Valves prevent backflow.
3. Explain the Bohr effect. (1 mark)
Show the mark scheme answer
More CO₂ lowers haemoglobin's oxygen affinity, releasing more oxygen.
Transport Systems in Mammals FAQs
What does this topic cover?
Vessels, blood, tissue fluid and haemoglobin.
What is double circulation?
Blood passes through the heart twice per circuit.
Why do red blood cells lack a nucleus?
To make more room for haemoglobin.
Revise this topic with flashcards: A Level Biology Flashcards, with mark scheme answers for Anki and Quizlet.
