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28 Cards in this Set
- Front
- Back
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What are the three types of nutrient transport? |
Diffusion, osmosis, active transport |
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What is diffusion? |
Transport of molecules of high concentration to low concentration Passive For molecules small enough, diffusion may occur across membranes |
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What is osmosis? |
Transport of water from high concentration to low concentration across a semi permeable membrane Passive |
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What is active transport? |
Transport of molecules from low concentration to high concentration Requires ATP and help of enzyme |
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What is usually transported actively? |
Sugars |
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Whta are the two ways the xylem transports water? |
Root pressure and transpirational pull |
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What is root pressure? |
Cells in the root actively transport water into the plant through the xylem |
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What is transpirational pull? |
As water evaporates, the water sort of chain pulls other molecules out of the stomata as well |
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What does phloem transport require? |
Requires living cells and enzymes |
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How do sucrose get transported? |
Through translocation As long as sucrose is converted to starch, sucrose can be continually moved through the vascular system |
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Why are membranes semi permeable? |
Hydrophobic inside and hydrophilic outside |
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What molecules can fit through the phospholipid? And which will not pass through? |
Gases and small molecules will pass Glucose and large molecules will not pass |
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What is hypotonic solution |
More solution on inside than outside |
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What is isotonic |
Same concentration on both sides |
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What is hypertonic |
More concentration on outside (eating chips) |
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What are the five plant hormones |
Auxins, cytokinins, gibberellins, ethylene, abscisic acid |
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What do auxins do? Where is it released? |
Elongates cells Released by apical meristem Too much can kill a plant(weed killers) |
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What do cytokinins do? |
Encourages cell division and differentiation Delays plant aging |
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What do gibberellins do? |
Promotes plant growth Strengthens and encourages early flower development |
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What does ethylene do? |
Causes fruit to decompose |
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What does abscisic acid do? |
Inhibits growth Produced when a plants environment becomes unfavourable |
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What are the three types of tropism a plant will move towards? |
Phototropism, gravitropism, thigmotropism |
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What is phototropism? |
Moves towards light |
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What is gravitropism |
Moves in directions of up and down |
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What is thigmotropism? |
Directional growth based on touch |
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What are the two types of plant responses? |
Nascent and stress |
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What is nascent response |
Mimosa pudica |
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What is stress response |
Plants release a high frequency sound when exposed to too much stress |
