7184912
Description
Flashcards by Kimberlee Hernandez, updated more than 1 year ago
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Created by Kimberlee Hernandez
almost 8 years ago
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| Question | Answer |
| Simple diffusion | Small uncharged nonpolar molecules (h2o, co2, 02, small lipids) |
| Facilitated diffusion | Ions and polar molecules pass through semipermeable membrane with help of specific proteins |
| Osmosis | Diffusion of water -aquaporins |
| Active transport | -requires energy -endocytosis and exocytosis change shape of membrane |
| Cholesterol on membrane | Prevents membrane from becoming too fluid |
| Carbohydrate chain on membrane | Acts as cell identification tags |
| Functions of Membrane proteins (6) | •transport (passive/active) •enzymatic activity •attachment to cytoskeleton and extra cellular membrane •cell to cell recognition •intercellular joining •signal transduction |
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