bio 120 2nd quiz
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Created by:
lauren9christine on October 6, 2009
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37 terms
Terms | Definitions |
|---|---|
 selectively permeable | only small and nonpolar things can pass |
| diffusion | movement of particles, from low to high |
| osmosis | movement of water, from high to low |
| things that affect rate of diffusion | concentration gradient, environmental factors, size of molecules |
| isotonic | equal solute/particles |
| hypertonic | more solute/particles |
| hypotonic | less solute/particles |
| facilitated diffusion | movement of specific molecules across cell membranes through protein channels |
| active transport |  goes against concentration gradient |
| active transport | requires energy (ATP) |
| active transport | non stop process |
| endocytosis | gets BIG things into the cell |
| phagocytosis | engulfment of particles |
| pinocytosis | engulfment of liquid |
| exocytosis | out of the cell |
| potential energy | stored energy |
| kinetic energy | energy being used |
| entropy | is a measure of randomness or disorder in the universe |
| entropy | takes energy to limit .... |
| metabolism | sum of all chemical reactions in an organism |
| measure of free energy | delta G |
| -deltaG | products have less energy than reactants |
| +deltaG | products have more energy than reactants |
| spontaneous reactions | -ΔG |
| exergonic reactions release | -ΔG |
| non spontaneous reactions | ΔG |
| activation energy | minimum amount of energy atoms/molecules require to react |
| feedback inhibition | product inhibits enzyme |
| competitive inhibition | active site blocked |
| non-competitive inhibition | something binds to the allosteric site |
| active site | inhibitor binds |
| covalent modification | modifies enzymes, causing shape change and changes in behavior |
| reduced | receive an electron |
| oxidized | donate an electron |
| make things, break things down, active transport and make more ATP | 4 functions of ATP |
| autotrophy | self feeders, builds food molecules |
| heterotrophy | what we are, consume other things |
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