Term
| describe short distance transport |
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Definition
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Term
| describe long distance transport |
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Definition
| whole plant, withing xylem an phloem |
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Term
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Definition
| absorb water and dissoved minerals |
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Term
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Definition
| transport water and minerals upward in xylem sap |
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Term
| what process occurs at the LEAVES? |
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Definition
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Term
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Definition
| the loss of water through the stomata |
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Term
| what does transpiration do? |
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Definition
| it creats the force that pulls xylem upward |
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Term
| where does the entering of CO2 an exiting of O2 occur? |
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Definition
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Term
| what do mesophyll cells do? |
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Definition
| produce sugar during photosynthesis |
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Term
| sugars are transported in what and by what? |
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Definition
| in phloem sap by the stems |
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Term
| what are the sugars used for? |
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Definition
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Term
| what comes in and leaves out during cellular respiration? |
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Definition
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Term
| what do the proton pumps do? |
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Definition
| transports or pump H+ out of the cell this creates the H+ gradient |
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Term
| what is membrane potential? |
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Definition
| the charge across the cell membrane |
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Term
| when there is a membran potential which is more negative inside or outside? |
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Definition
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Term
| what are other uses of the proton pumps? |
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Definition
| drives transport of other subsatances like K+, cotransport of anions and sucrose |
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Term
| what is the water potential of pure water? |
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Definition
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Term
| what is pressure potential? |
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Definition
| physical pressure on solution |
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Term
| what is the function of the tonoplast? |
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Definition
| regulates molecular traffic between cytosol and contents |
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Term
| what do plasmodesmata do ? |
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Definition
| connect the cytosol of cells |
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Term
| what is the difference between the transmembrane route and the symplastic route? |
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Definition
| the TRM route is from cell to cell through the plamamembranse but the SYM route is through the plasmodesmata |
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Term
| describe the apoplastic route |
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Definition
| through the cell wall & extracellular spaces |
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Term
| what does the casparian strip do? |
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Definition
| it prevents apoplastic transport into the vascular cylinder |
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Term
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Definition
| attraction of water to xylem walls and keeps column of water from falling |
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Term
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Definition
| attraction between water molecules, forms the column of water |
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Term
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Definition
| evaporation of water form the leaves via the stomata |
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Term
| the opening of gaurd cell has to do with the accumalation of what? |
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Definition
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Term
| what is happening to the guard cells in terms of structure when the stomata opens? |
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Definition
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Term
| the closing of the stomata has to do with the loss of what? |
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Definition
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Term
| what are the 4 steps in the bulk transport of phloem? |
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Definition
1-sucrose enters the phloem
2-water potentioal decreases, water enters and high pressure is the result
3-secrose exits
4-water potential increases, water exits and low pressure is the result |
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