17167396
Beschreibung
Karteikarten von Sam Gunnell, aktualisiert more than 1 year ago
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Erstellt von Sam Gunnell
vor mehr als 5 Jahre
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| Frage | Antworten |
| Define diffusion | The net movement of molecules (or ions) from a reigon of higher concentration to a reigon of lower concentration |
| What is simple diffusion? | Movement through the phospholipid bilayer |
| What molecules can pass through the phospholipid bilayer through simple diffusion? | Small or lipid soluble (non-polar molecules) |
| Are lipid soluble molecules polar or non-polar? | Non-polar |
| Are water soluble molecules polar or non-polar? | Polar |
| What is facilitated diffusion? | Movement of ions or molecules through a channel/carrier proteins |
| What can pass through channel proteins? | Specific ions such as sodium, calcium |
| ,What can pass through a carrier protein? | Specific, large, polar molecules such as glucose or amino acids |
| How do carrier proteins work? | A specific molecule binds to the protein, it changes shape and allows it to cross the membrane |
| Define active transport | Movement of molecules against the concentraion gradient, from low to high concentration |
| How do the molecules pass through the membrane during active transport? | Carrier proteins |
| What three factors effect active transport? | Temperature Oxygen (used for ATP) Poisen (stops respiration) |
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