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31 Cards in this Set
- Front
- Back
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Diffusion
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movement of any molecule from more to less across a concentration gradient.
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Osmosis
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water through semi-permeable membrane
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hypotonic
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"under" - less solute, more water
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hypertonic
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"over" - more solute, less water
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isotonic
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same
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role of osmosis
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-tugor
-plasmolysis -crenation -cytolysis -contractile vacuole |
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other transport
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passive - no energy
active - use energy carrier transport facilitated diffusion active transport Sodium-potassium pum (nerve conduction) gated channels - (Calcium-muscle contraction) endocytosis-phagocytosis-solids -pinocytosis-liquids exocytosis |
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Connections between cells
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Animals-tight Plant-plasmodesmata
-desmosomes -gap |
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carbon markers
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cell recognition - heart, blood types, immune reactions.
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semipermeable
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certain things can go through, but not others.
based on:size-charge-solubility in membrane |
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what will non-polar hydrophobic molecules do to the membrane?
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they will dissolve the membrane and cross with ease, like alcohol.
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what will polar hydrophillic molecules do to the membrane?
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they will pass if small, like water and carbon dioxide. larger molecules will not. glucose does not pass easily.
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transport proteins
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protein molecules that serve as channels through the membrane. If molecules can't pass through proteins, then they must pass through phospholipids.
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uniport
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"one way street"
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symport
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two things, still one way street
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antiports
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regular street; passes both ways
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concentration gradient
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the difference between one area of solute and another. movement is a passive process. no energy involved.
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hyperosmotic
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solute "over" - more solute, less water
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hyposmotic
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"under" less solute, more water
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isosomotic
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equal
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crenation
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shriveling of animal cells - lose water
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plasmolysis
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shriveling of plant cells - lose water
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tugid
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stiffness in plants
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flaccid
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limp plant cell
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lysed
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ruptured
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active transport
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3 sodiums in, 2 potassiums out - ATP cycle - nerve conduction, photosynthesis.
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endocytosis
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to take in
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phagocytosis
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to take in - solids
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pinocytosis
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to take in - liquids
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lygans
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allow things to come in
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exocytosis
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to release
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