| Front | How does the presence of a double bond in a lipid affect its boiling point? (1 mark) |
| Back | Lowers the boiling point |
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| Front | What two measurements are needed to calculate an index of diversity? |
| Back | Number of (individuals of) each species and Total number of individuals |
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| Front | Why is diffusion of gases between alveolar and blood rapid |
| Back | Red blood cells slowed down as they pass pulmonary capillaries allowing more time for diffusion.The distance between alveolar air and red blood cells reduced as red blood cells flattened against capillary walls.Walls of alveoli and capillaries very thin creating a short diffusion pathBlood flow from pulmonary capillaries maintains a concentration gradientAlveoli and pulmonary capillaries have a large total surface area. |
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