| A | B |
|---|
| main component of the cell membrane | phospholipids |
| polar/hydrophilic part of phospholipid | phosphate head |
| non-polar/hydrophobic part of phospholipid | fatty acid tails |
| substances that can go directly through the lipid bilayer | small, nonpolar substances like oxygen and carbon dioxide |
| How do small polar/charged substances get through the membrane? | proteins |
| In a _____________ situation, the extracellular fluid has lower osmolarity than the fluid inside the cell, and water enters the cell. | hypotonic |
| In a _____________ situation, the extracellular fluid has higher osmolarity than the fluid inside the cell, and water will leave the cell | hypertonic |
| In an __________________ solution, the extracellular fluid has the same osmolarity as the cell. | isotonic |
| After substance has diffused, and there is no more concentration gradient, molecules will continue to move, but there will be no net movement. | Dynamic Equilibrium |
| In _______________ transport, substances move from high to low concentration without requiring energy | passive |
| In ________________ transport, substances move from low to high concentration, requiring energy | active |
| Diffusion of water from high to low contration of water | osmosis |
| The sodium potassium pump moves: | 3 Na out & 2 K in |
| The cytoplasm of the cell is electrically ______________ | negative |
