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Chapter Five
Cell Transport and membrane activity
| Question | Answer |
|---|---|
| Channel Proteins | Allows particular molecules or ions to cross the plasma. This is a passive transport. |
| Carrier Proteins | Selectively interacts with a specific molecule or ion so that it can cross the plasma membrane. Active Plasma Transport. |
| Cell Recognition Protein | Has glycoproteins attached that are major histocompatibility complex (MHC) that are different for each person. "Self, Not Self." |
| Receptor Proteins | Can only bind to specific molecules based on their shape. |
| Enzymatic Proteins | Catalyzes as specific reaction. Increases chemical reactions. |
| Junction Proteins | Tight junctions join cells so that a tissue can fulfill a function. |
| Three types of Passive Diffusion | Simple, Facilitated, Osmosis |
| Tonicity | relative solute concentrations across membranes. |
| Isotonic | Equal - water moves but concentrations remain the same |
| Hypertonic | High tonicity concentrations move from high to low |
| Hypotonic | Low Tonicity - concentrations move from high to low. |
| active transport | goes against concentration gradient From low to high concentration. ATP used for energy |
| passive transport | no energy diffusion |
| Facilitated Diffusion | uses transport proteins to cross membrane. Channel Proteins and Carrier Proteins |
| Simple Diffusion | no energy molecules move along their concentration gradient until equilibrium is reached. |
| Osmosis | Only water can pass thru Aquaporin Proteins |
| Bulk Transport | Requires energy. Macromolecules passed into / out of membrane uses Vesicles to move in and out of cell. |
| Types of Bulk Transport | Exocytosis and Endocytosis |
| 3 types of Endocytosis | Phagocytosis, pinocytosis, and Receptor mediated endocytosis |
| EFM | Extra Cellular Fluid |
| ECM | Extra Cellular Matrix |