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Description
Flashcards by Sam Gunnell, updated more than 1 year ago
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Created by Sam Gunnell
almost 6 years ago
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| Question | Answer |
| Explain how mammal lungs have a large surface area | They have lots of alveoli |
| How do plant leaves have a large surface area? | Leaves are very large to abosrb as much sunlight as possible |
| How do mammal lungs reduce their thickness to improve the uptake of oxygen? | Alveoli are one cell thick |
| How does the principle of concentration gradient relate to mammal lungs? | Blood has a low concentration of oxygen and lungs have a very high oxygen concentration so more diffusion takes place |
| Explain how the principle of concentrastion gradient relates to plant leaves | There is a high concentration of CO2 in the air compared to the leaf so CO2 enters the leaf through the stoma |
| How are plant leaves protected from drying out? | The transpiration system keeps the leaf surfaces moist |
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