<span>Active and passive transport help to maintain homeostasis because they transport fluid/water/materials across the plasma lemma (cell membrane). All of these materials need to exist in certain ratios for the cell to function properly. </span>
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<h3>Sankey diagrams are a type of flow diagram in which the width of the arrows is proportional to the flow rate. The illustration shows a Sankey diagram that represents all the primary energy flows into a factory. </h3>
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