specialised exchange surfaces 0.0 / 5 ? BiologyExchange surfaces and breathingA2/A-levelOCR Created by: Grace_FlowerdayCreated on: 20-11-19 09:36 324516 Across 1. The steeper the concentration gradient the faster the rate of diffusion. (4, 5, 6) 6. The larger the animal is the smaller the ____ratio is. (3) Down 2. ____to maintain concentration gradient. (11, 8) 3. Provides the area needed for exchange and overcomes SA:V ratio of larger organisms. (9, 7, 4) 4. Makes the distance that the substances have to diffuse shorter (4, 6) 5. A microscopic organism the relies on diffusion to exchange gasses. (6)
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