Water flows from higher to lower water potential 8

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Unformatted text preview: & voltage difference - - can be used by cotransport 6. Water potential is the physical property predicting the direction in which water will flow, governed by solute concentration and applied pressure. water potential- prediction of the direction of water flow 7. Water potential determines the direction of water movement because water flows from regions of higher water potential to regions of lower water potential (if there is no barrier). water flows from higher to lower water potential 8. The three major pathways of transport between plant cells are the transmembrane, symplastic, and apoplastic routes. Substances can transport form one pathway to another. transmembrane= out of one cell, across a cell wall, and into another cell symplastic= via the continuum of cytosol apoplastic= via the cell walls and extracellular spaces 9. The waxy Caspian strip of the endodermal wall blocks apoplastic transfer of water and minerals from the cortex to the vascular cylinder. Caspian strip blocks apoplastic transfer of water & minerals to vascular cylinder 10. Transpiration produces negative pressure (tension) in the leaf, which exerts a pulling force on water in the xylem, pulling water into the leaf. negative pressure of transpiration pulls water into leaf 11. The properties of water that make the movement of xylem sap against gravity are: 12. Stomata are microscopic forces surrounded by guard cells in the epidermis of leaves and stems that allows gas exchange between the environment and the interior of the plant. Changes in turgor pressure that open and close stomata result primarily from the reversible uptake and loss of potassium ions by the guard cells. stomata are forces surrounded by guard cells in epidermis that allow gas exchange between air and inside of plant; changes in turgor open & close...
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This document was uploaded on 03/02/2014 for the course BIO 109 at University of Missouri-Kansas City .

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