Exchange Surfaces 1.0 / 5 based on 1 rating ? BiologyExchange of materialsGCSEAQA Created by: Emma:pCreated on: 16-04-13 13:21 What is found in the small intestine? Villi 1 of 6 How does the alveolus having an increase surface area help? Maximises rate of reaction 2 of 6 How is the concentration gradient in the small intestine maintained? Fresh food gets brought along all the time 3 of 6 Where is the alveolus found? In the lungs 4 of 6 What is active transport? Diffusion against the concentration gradient 5 of 6 What is osmosis? Diffusion of water 6 of 6
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