Term
| what are the 3 main purposes of the cell membrane? |
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Definition
| regulates what comes in/out, holds cell together, protects from environment |
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Term
| what kind of permeability does the cell membrane have? |
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Definition
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Term
| what is the old success of the cell membrane referred to as? |
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Definition
|
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Term
| what 2 categories of molecules move in/out of the cell membrane easily? |
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Definition
small/neutral molecules (H2O, CO2, O2)
lipids |
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Term
| what helps things move in/out of the cell membrane? |
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Definition
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Term
| what do proteins control the movement of compounds through the cell membrane based on? |
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Definition
| size, shape, charge, receptor site |
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Term
| what kind of molecules do charged proteins attract? |
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Definition
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Term
| what is a glycoprotein? (compostion) |
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Definition
| glucose monomers connected to a protein |
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Term
|
Definition
| glucose monomers connected to a lipid |
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Term
| what is the function of of glycoproteins? |
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Definition
| serve as self vs self recognition |
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Term
| what is self vs self recognition? |
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Definition
| glycoproteins recognize if cells are part of the organism or foreign - important so red blood cells can recognize if they should attack |
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Term
| what does self vs self recognition cause problems with? |
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Definition
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Term
| what are glycolipids know as in regard to their function? |
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Definition
|
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Term
| what do glycolipids do as cellular markers? |
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Definition
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Term
| what year was the fluid mosaic model created? |
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Definition
|
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Term
| who created the fluid mosaic model? |
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Definition
|
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Term
| what does the fluid mosiac model state? |
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Definition
| cell membrane proteins are individually inserted into the phospholipid bilayer and move fluidly |
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Term
| what happened to the food coloring when we dropped it in the water? |
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Definition
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Term
| what kind of food coloring diffuses slower, heavier or lighter molecules? |
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Definition
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Term
| what disturbs normal diffusion? |
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Definition
|
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Term
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Definition
| the tendency of a molecule to spread out in available space |
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Term
| what way do molecules in your body move on the CG (concentration gradient)? |
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Definition
|
|
Term
| what happens to the molecules after equilibrium is reached? |
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Definition
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Term
| every molecule has what kind of CG? |
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Definition
|
|
Term
| what is passive transport? |
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Definition
| the diffusion of a substance across a membrane |
|
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Term
| what is facilitated diffusion? is it passive or active transport? |
|
Definition
diffusion with aide of a protein
still passive transport |
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Term
|
Definition
| the transport of WATER across a membrane |
|
|
Term
| what is active transport? |
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Definition
| moves molecules against CG, uses energy |
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Term
| what kinds of cells is passive transport essential in? |
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Definition
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|
Term
| why can ions not pass through selectively permeable membrane? |
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Definition
|
|
Term
| what 3 molecules have difficulty passing through a selectively permeable membrane? |
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Definition
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|
Term
| what color is Phenolphthalein? |
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Definition
|
|
Term
| what is Phenolphthalein and indicator for? |
|
Definition
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|
Term
| what color does Phenolphthalein turn when test is positive? |
|
Definition
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|
Term
| what 2 ways does dialysis tubing differ from cell membrane? |
|
Definition
dialysis tubing is not living
dialysis tubing is semipermeable (based on size) |
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Term
| what is a hypertonic solution? |
|
Definition
| solution with higher concentration of solute (more stuff, less water) |
|
|
Term
| what is a hypotonic solution? |
|
Definition
| solution with lower concentration of solute (less stuff, more water) |
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|
Term
| what is an isotonic solution? |
|
Definition
| solution with equal concentration (equal stuff and water) |
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Term
| what happens to plant and animal cells in an isotonic environment? |
|
Definition
plant: loses water quickly and becomes flaccid
animal: nothing |
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|
Term
| what happens to plant and animal cells in a hypertonic environment? |
|
Definition
plant: plasmolicize (die quickly)
animal: lose water/shrivel up/die |
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|
Term
| what happens to plant and animal cells in a hypotonic environment? |
|
Definition
plant: turgid (rigid)
animal: lysed (burst) |
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|
Term
| proteins have characteristics that are specific to ____ |
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Definition
|
|
Term
| what is facilitated diffusion? |
|
Definition
| same as diffusion, but happens via a transport protein |
|
|
Term
| example of facilitated diffusion? |
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Definition
| glucose transport proteins in liver carry glucose from blood to cytoplasm, but not fructose |
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|
Term
| which direction does TP move in? |
|
Definition
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