8 Exchange and transport in animals

Practice questions on Exchange and transport in animals

• During exercise, the breathing rate of a student increases. Explain how this helps to main… (4 marks, Explain)
• Explain how the alveoli are adapted to allow efficient gas exchange in the lungs. (4 marks, Explain)
• Explain why a single-celled organism does not need a specialised exchange surface or a cir… (4 marks, Explain)
• Explain why multicellular animals need a circulatory system, whereas single-celled organis… (4 marks, Explain)
• Explain why red blood cells are well adapted for transporting oxygen around the body. (4 marks, Explain)
• Explain how plasma and platelets each carry out their functions in the blood. (4 marks, Explain)
• Explain how white blood cells defend the body against pathogens. (4 marks, Explain)
• Explain why mammals have a double circulatory system rather than a single circulatory syst… (4 marks, Explain)
• Explain how the structure of capillaries makes them well suited for the exchange of substa… (4 marks, Explain)
• Explain why a large multicellular animal, such as a fish, requires a specialised exchange … (4 marks, Explain)