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BIO
| Question | Answer |
|---|---|
| what is diffusion? | molecules moving from a high concentration to a low concentration |
| what is carbohydrates? | consist of carbons with water attached providing long term energy storage |
| 4 important reasons water specializes in supporting life? | remains liquid over a wide temp range dissolves most substances changes temp gradually when heated or cooled one of the only pure substances that expands |
| 3 functions of protein | facilitate chemical reactions transport substances act as chemical messenger |
| how many amino acids does a human need? | A human needs 20 amino acids 12 of the acids are from non-protein food sources the other 8 are present from your food |
| homeostasis | availability of maintaining a constant environment |
| cell membrane functions | transport raw materials gets rid of wastes acts as a barrier of unwanted stuff |
| fluid mosaic model | describes that the membrane has a fluid like consistency |
| cholesterol in the membrane | allows the cell membrane exist in a wide variety of temperatures such as cold keeping from freezing and warm keeping it from melting |
| osmosis | the diffusion of water across a semi-permeable membrane |
| 3 types of cellular tonicity | isotonic solution hypotonic solution hyperotonic solution |
| isotonic solution | water concentrated outside the cell is equal to the inside of the cell |
| hypotonic solution | water concentration outside the cell is less than the th solute inside the cell |
| hyperotonic solution | water concentration outside the cell is less than the water concentrated inside the cell |
| what is facilitated diffusion ? | the process which substances can not move through out the cell without assistance |
| carrier protein | changes shape to move specific molecules in or out of the cell |
| channel protein | provides a tunnel to allow ions to move in or out of the cell |
| active transport | helps move materials up the concentration gradient |
| where can you find active transport | intestinal cells pump nutrients from the gut |
| endocytosis | bringing things into the cell, membrane folds in on itself trapping matter going from high to low or low to high |
| exocytosis | getting rid of things from the cell, it opens up and lets out matter going only low to high |
| bulk membrane | the method of getting the materials in and out of the cell |
| what's a organic compound? | molecule that contains carbon and hydrogen |
| cold temperatures | keeps the membrane fluidic and flexible preventing frozen membrane |
| warmer temperatures | maintains ridged prevents from melting |
Created by:
emsa2252
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