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26 Cards in this Set
- Front
- Back
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what's the difference between active and passive transport
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active-cell expends energy, low to high concentration
passive- cell does not expend energy, high to low concentration |
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list 4 types of passive transport
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osmosis, diffusion, facilitated diffusion, ion channel
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diffusion will eventually cause the molecules to be in what state
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equilibrium
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what is equilibrium
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a balance of concentration inside and outside of the cell
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do particles stop moving at equilibrium
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no, the rate becomes equal inside and outside
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what is osmosis
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the diffusion of water from high to low, a type of passive transport
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what happens when a cell is is placed in a hypotonic environment
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more water outside the cell, water moves inside
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what happens when a cell is placed in a hypertonic environment
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more water inside the cell, water moves out
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what happens to a cell in a isotonic environment
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same amount of water inside and outside of the cell, no movement
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what does a contractile vacuole do for single celled organisms
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it removes water from a cell
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what's the difference between plasmolysis and cytolysis
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plasmolysis- inside a plant cell, hypertonic solution cell membrane separates from the cell wall
cytolysis-inside an animal cell, hypertonic solution the cell ruptures |
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what do carrier proteins do in facilitated diffusion
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helps the molecules move through a membrane, it makes channels
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what is required for active transport
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ATP or energy
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what`s the difference between endocytosis and exocytosis
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endocytosis- brings things in
exocytosis- takes things out |
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moves large molecules or even entire cells into the cell membrane
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phagocytosis
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the energy needed to power the sodium-potassium pump, endocytosis, and exocytosis is provided by what
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mitochondria/ATP
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how does a phagocyte destroy bacteria
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the phagocyte allows lysosomes to fuse with vesciles that contain bacteria and virsuses. The enzymes within the lysosomes destroy the bacteria abd vacuoles
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why is it important that ions being transported across a cell membrane be shielded from the interior of the lipid bilayer
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the lipid bilayer is hydrophobic on the outside and hydrophillic on the inside, so it dissolves ions
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why are the vesicles formed during pinocytosis much smaller than those formed during phagocytosis?
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during pinocytosis solutes or fluids are being moved, during phagocytosis large molecules or whole cells are being moved
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6
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4
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5
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what is diffusion driven by
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the molecule`s kinectic energy
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