Topic 8 Flashcards
Characteristics of the alveoli
- moist walls
- very thin walls
- large surface area
What factors affect rate of diffusion
Diffusion distance
concentration gradient
surface area
Bloodworms have a high level of haemoglobin in their blood. Give a reason why this helps them survive in polluted water.
Haemoglobin binds to oxygen
Why is cellular respiration essential for living organisms
Because they need to release energy for metabolic processes
Why does oxygen uptake increase as an athlete runs at faster speeds
Because the muscles contract more needing to respire more to create more energy
What is the word equation for aerobic respiration
Glucose + oxygen –> Carbon dioxide + water
Why in an experiment do germinating peas have the highest rate of oxygen consumption?
Because germinating peas respire which means they take in oxygen to release energy for growth
Why is carbon dioxide present in germinating peas and not dried peas
Germinating peas produce carbon dioxide because they respire aerobically
