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Transport of substances across a membrane without any input of energy by the cell. a. Diffusion b. Osmosis.

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Presentation on theme: "Transport of substances across a membrane without any input of energy by the cell. a. Diffusion b. Osmosis."— Presentation transcript:

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3 Transport of substances across a membrane without any input of energy by the cell. a. Diffusion b. Osmosis

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5 Moves molecules across the cell membrane from an area of LOWER concentration to an area of HIGHER concentration It requires cells to expend energy

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7 Vesicles made by the cell fuse with the cell membrane, releasing their contents into the external environment

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9 b. Endocytosis 1. Pinocytosis- vesicle contains fluids (cell drinking) 2. Phagocytosis- vesicles contain large particles or cells (cell eating)

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