Seventh Edition
Test on Nov. 14, 2011
Terms : Hide Images
| 1761100540 | what are membranes composed primarily of? | phospholipids | 0 | |
| 1761100541 | diffusion refers to the movement of what? | particles | 1 | |
| 1761100542 | osmosis refers to the movement of what? | water across a membrane | 2 | |
| 1761100543 | do channel proteins require energy? | no | 3 | |
| 1761100544 | do carrier proteins require energy? | yes | 4 | |
| 1761100545 | what molecule is cells is commonly used to provide energy for reactions? | ATP | 5 | |
| 1761100546 | what are the characteristics that molecules have that can move across membranes without transport protein? | -hydrophobic -small | 6 | |
| 1761100547 | what happens to a plant celled that is placed in distilled water? | becomes turgid | 7 | |
| 1761100548 | what happened to an animal cell places in distilled water | it will burst | 8 | |
| 1761100549 | facilitated diffusion across a membrane requires what? | transport proteins | 9 | |
| 1761100550 | how do molecules cross cell membranes? | passive transport and active transport | 10 | |
| 1761100551 | what transports large molecules across membranes? | exocytosis and endocytosis | 11 | |
| 1761100552 | cells transform what as they perform work? | energy | 12 | |
| 1761100553 | chemical reactions either ______ or _____ energy. | release, store | 13 | |
| 1761100554 | how do membranes form? | sponatneously | 14 | |
| 1761100555 | plasma membrane | -encloses the cell -acts as a barrier -made of phospholipid bilayer -consistency of oil -gets cold -> membrane gets stiff | 15 | |
| 1761100556 | what do proteins do? | span the membrane and drift around | 16 | |
| 1761100557 | what keeps the membrane fluid? | unsaturated fats in phosphlipids & good cholesterol | 17 | |
| 1761100558 | membrane proteins | -communication -tell other cells what they are | 18 | |
| 1761100559 | enzymes | -break or help create bonds -channels - no energy required -carrier proteins- help something get in or out with the use of energy (ATP) | 19 | |
| 1761100560 | passive defussion | -tendency of particles to spread out evenly -no energy | 20 | |
| 1761100561 | true or false: each type of molecules diffuses independently? | True | 21 | |
| 1761100562 | osmosis | the movement of water to areas with more particles | 22 | |
| 1761100563 | isotonic solution | solution outside cell has the same concentration of particles as the cell plant - flacid animal - normal | 23 | |
| 1761100564 | hypertonic solution | more particles in the solution than in the cell plant - turgid animal- lysed | 24 | |
| 1761100565 | hypotonic solution | solution has fewer particles than the cell plant- shriveled animal- shriveled | 25 | |
| 1761100566 | osmoregulation | control of uptake of released water | 26 | |
| 1761100567 | proteins that ____ the membrane can allow other things to cross | span | 27 | |
| 1761100568 | transport protein | 1. solute binding 2. phophorylation 3. transport -regules energy -transports solutes against their concentration gradient -with: more -> less -against: less -> more (use ATP) | 28 | |
| 1761100569 | channel proteins | holes that allows diffusion of solutes down concentration gradient - no energy gradient | 29 | |
| 1761100570 | bulk transport | -endocytosis -exocytosis | 30 | |
| 1761100571 | endocytosis | bringing large items in by pinching the plasma membrane into a vesicle | 31 | |
| 1761100572 | phagocytosis (endocytosis) | bringing in by particles | 32 | |
| 1761100573 | pinocytosis (endocytosis) | bringing many tiny particles | 33 | |
| 1761100574 | receptor mediated endocytosis | -by having receptors, they select certain things to come in | 34 | |
| 1761100575 | exotysis | -opposite of endocytosis -takes things out of the cell by fusing a vesicle from inside with the plasma membrane and dumping the contents out | 35 |
