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5.7: Cell Transport - Biology LibreTexts Transport Across Cell Membrane Notes, Cell Biology Notes College, Cell Transport Notes, Cell Wall Structure, Biology Tips, Cell Membrane Transport, Membrane Transport, Uni Notes, Cell Biology Notes

If a cell were a house, the plasma membrane would be walls with windows and doors. Moving things in and out of the cell is an important role of the plasma membrane. It controls everything that enters and leaves the cell. There are two basic ways that substances can cross the plasma membrane: passive transport, which requires no energy; and active transport, which requires energy.

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