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Membranes and transport

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Which part generally faces the cytosol?

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At equal water potentials across a water-permeable membrane, what happens?

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A cotransporter brings glucose uphill while sodium moves downhill. Which is best?

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What happens to a secretory vesicle's lumen during exocytosis?

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Question 1 of 3

Choose between transport models

Solute X uptake is selective and saturates. Uptake remains downhill and is unaffected immediately by inhibiting ATP production. Which mechanism is consistent with the evidence, and what cannot yet be concluded?

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