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Transport przez błonę komórkową


The model below shows how glucose, sodium ions (Na+), and potassium ions (K+) move between the intestinal lumen, an epithelial cell, and the blood in the small intestine. The relative concentrations of glucose, Na+, and K+ inside and outside the epithelial cell are indicated.
Based on the model, which of the following movements does not require an input of energy?
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