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23 Cards in this Set
- Front
- Back
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passive transport |
the movement of substances through a cell membrane without using the cell's energy |
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diffusion |
the movement of substances from an area of higher concentration to an area of lower concentration |
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osmosis |
the diffusion of water molecules only through a membrane |
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facilitated diffusion |
the process by which molecules pass through a cell membrane using special proteins called transport proteins |
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active transport |
the movement of substances through a cell membrane using the cell's energy
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endocytosis |
the process during which a cell takes in a substance by surrounding it with the cell
membrane |
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exocytosis |
the process during which a cell's vesicles release their contents outside the cell |
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semipermeable |
the cell membrane only allows certain substances to enter or exit the cell |
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osmosis in the cell |
the vacuoles water level in increased and decreased without energy |
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Why is energy needed for active transport |
the materials entering and exiting the cell are too large to diffuse through the cell membrane |
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why is energy not needed for passive transport |
the materials entering and exiting the cell are small enough to pass through the cell membrane |
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summarize the function of endocytosis |
moving a larger substance across the cell membrane using transport proteins |
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contrast osmosis and diffusion |
osmosis is the movement of water through a cell membrane and diffusion is moving small molecules from higher concentration to lower concentration |
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facilitated diffusion |
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endocytosis |
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exocytosis |
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osmosis |
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diffusion |
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is diffusion active or passive transport |
passive transport |
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is osmosis active or passive transport |
passive transport |
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is facilitated diffusion active or passive transport |
passive transport |
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is endocytosis active or passive transport |
active transport |
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is exocytosis active or passive transport |
active transport |
