AP Biology: Membranes & Transport OLD Flashcards
Covers general terms for cellular transport for AP Biology.
Terms : Hide Images [1]
| 5433433864 | Selectively Permeable | a property of cell membranes that allows some substances to pass through, while others cannot |  | 0 |
| 5433433865 | Phospholipid Bilayer | double layer of phospholipids that makes up plasma and organelle membranes |  | 1 |
| 5433433870 | Passive Transport | transport that does not require the cell to expend energy (high to low concentration) |  | 2 |
| 5433433871 | Active Transport | energy-requiring process where a substance moves against the concentration gradient (low to high concentration) |  | 3 |
| 5433433872 | Diffusion | net movement of a substance down a concentration gradient (high to low) |  | 4 |
| 5433433873 | Facilitated Diffusion | diffusion of solutes across a membrane, with the help of transport proteins, does not require energy |  | 5 |
| 5433433874 | Osmosis | diffusion of water across a selectively permeable membrane |  | 6 |
| 5433433875 | Hypertonic | solute concentration is greater than inside the cell, cell loses water; plant cells plasmolyze, animal cells crenate |  | 7 |
| 5433433876 | Hypotonic | solute concentrations in less than inside the cell, cell gains water; animal cells lyse, plant cells have ideal turgor pressure |  | 8 |
| 5433433877 | Isotonic | solute concentrations are the same on both sides of the membrane, cell does not gain or lose water; ideal condition for animal cells |  | 9 |
| 5433433878 | Sodium-Potassium Pump | actively pumps Na+ ions out and K+ ions in, 3 Na leave for every 2 K that enter |  | 10 |
| 5433433881 | Exocytosis | exporting macromolecules by fusion of vesicles with the plasma membrane |  | 11 |
| 5433433882 | Endocytosis | importing macromolecules by forming vesicles derived from plasma membrane |  | 12 |
| 5433433891 | Concentration Gradient | a difference in concentration across a distance |  | 13 |
| 5433433898 | cholesterol | A large, ring shaped lipid found in cell membranes. Its presence helps to maintain flexibility and fluidity in the membrane. |  | 14 |
| 8661261365 | polar | molecule with partial charges; mixes with water |  | 15 |
| 8661264138 | nonpolar | molecule without partial charges; does not mix with water |  | 16 |
| 8661266864 | solute | something dissolved in a solution | 17 | |
| 8661269941 | solvent | dissolving agent of a solution; in biological systems usually water | 18 | |
| 8661275459 | plasma membrane | membrane at the boundary of every cell that acts as a selective barrier, thereby regulating the cell's chemical composition |  | 19 |
| 8661285047 | transport | an exchange of molecules (and their kinetic energy) across the boundary between adjacent layers of a fluid or across cell membranes. | 20 | |
| 8661296538 | phospholipid bilayer | A double layer of phospholipids that makes up plasma and organelle membranes. | | 21 |
| 8661303985 | phospholipid | a lipid with a polar head and nonpolar tails that comprises the majority of cellular membranes |  | 22 |
| 8661312346 | hydrophobic | "water-hating" nonpolar regions of molecules that are excluded by polar and charged regions of molecules | 23 | |
| 8661352956 | hydrophillic | "water-loving" polar/charged regions of molecules that exclusively associate with polar/charged regions of molecules | 24 |