Gas Exchange 0.0 / 5 ? BiologyGas ExchangeASEdexcel Created by: ellael2Created on: 17-04-18 19:34 What is supply? The rate at which metabolites can enter a cell or organism. 1 of 6 What is supply dependent on? The surface area of the relevant exchange surface. 2 of 6 What is demand? The rate at which an organism uses its metabolites. 3 of 6 What is demand dependent on? The number of active cells in the body. 4 of 6 Choose the correct words. The larger/smaller the organism, the larger/smaller the surface area to volume ratio. Larger, smaller 5 of 6 What are the two ways in which large active organisms can overcome the limitations of a small surface area to volume ratio. 1. Adaptation that increase the area of exchange surfaces 6 of 6
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