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NBCHBCh5Carrell
| Question | Answer |
|---|---|
| Which types of junctions allow materials to pass between the cells? | Desmosomes, gap junctions, plasmodesmata |
| What type of proteins do each of the junctions use? | Tight junction-membrane proteins. Desmosomes-keratin, plaque. Gap junction-channel proteins (connexons). Plasmodesmata-RNA |
| What type of cells are tight junctions in? | Epithelial (skin) cells, lining of lumen of organs |
| What are the three concentrations of materials inside/outside a cell? | Isotonic (equal), hypertonic (higher), hypotonic (lower) |
| What is selective permeability? | Allowing some materials to pass through but not others |
| What is the difference between active transport and passive transport? | Active transport moves molecules opposite their concentration gradient |
| What type of molecule is a key catalyst for the sodium-potassium pump? | ATP |
| What are the three types of transport protein and what do they do? | Uniport-moves one substance in one direction. Symport-moves two substances in the same direction. Antiport-moves two substances in opposite directions. |
| Of the four processes, which is the only one that is used in aplant cell? | Exocytosis |
| What is the difference between phagocytosis abd pinocytosis? | Phagocytosis takes in food and pinocytosis takes in liquids |
| What organelle(s) are involved in phagocytosis if the phagosome contains a lipid? | Plasma membrane, golgi apparatus |
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13Carrell3
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