Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Stack #1089221
Chapter 36
| Question | Answer |
|---|---|
| Active transport | A kind of transport wherein ions or molecules move against a concentration gradient -Lower concentration to higher |
| Passive transport | A kind of transport by which ions or molecules move along a concentration -higher concentration to lower concentration |
| cotransport | Plants cell use the energy of H+ gradients to cotransport other solutes by active transport |
| membrane potential | established through pumping of H+ by proton pump |
| water potential and water movement | -is a measurement of solute concentration and pressure -determines direction of water movement -determines the direction of movement of water |
| positive pressure | -relatively weak and is minor mechanism of xylem bulk flow |
| negative pressure | Xylem is normally under negative pressure (tension) -water cohesion pull water from shoots to the roots |
| tonoplast | regulating the movements of ions around the cell |
| routes of water movement through a plant | 1. apoplastic route, through cell and extracellular space 2. symplastic route, through the cytosol 3. transmembrane route, across cell walls |
| Casparian strip | endodermal wall blocks apoplastic transfer of minerals from the cortex to the vascular cylinder |
| guttation | the exudation of water droplets on tips or edges of leaves |
| Transpiration | the evaporation of water from a plant's surface |
| transpiration pull | negative water potential of laeves provide the "pull" in transpiration |
| Adhersion | -water molecules are attracted to cellulose in xylem cell walls through adhesion -offset the force of gavity |
| Cohesion | -water molecules are attracted to each other |
| Stomata | porous holes |
| Guard cells | -help balance water conservation with gas exchange for photosynthesis |
| stomatal opening cues | 1. light 2. CO2 depletion 3. internal "clock" guard cells |
| xerophytes | are plants adapted to arid climates |
| source | an organ that is a net producer or sugar, such as mature leaves |
| sink | an organ that is a net consumer or storer of sugar, such as a tuber or bulb |
| phloem loading and transport (translocation) | the products of photosynthesis are transported through phloem |
| Osmosis | determines the net uptake or water loss by a cell and is affected by solute concentration and pressure |
| Mechanism of stomatal Opening and Closing | -Changes in turgor pressure open and close -turgid, guard cells bow outward and the pore between them open -flaccid, guard cells become less bowed and the pores closes |
Created by:
pcao01
Popular Biology sets