How to solve Water Potential problems

- Plants use water potential to transport water to the leaves so that photosynthesis can take place. - Water potential is a measure of the potential energy in water as well as the difference between the potential in a given water sample and pure water. - Water potential is represented by the equation Ψsystem = Ψtotal = Ψs Ψp Ψg Ψm. - Water always moves from the system with a higher water potential to the system with a lower water potential. - Solute potential (Ψs) decreases with increasing solute concentration; a decrease in Ψs causes a decrease in the total water potential. - The internal water potential of a plant cell is more negative than pure water; this causes water to move from the soil into plant roots via osmosis.. - solute potential: (osmotic potential) pressure which needs to be applied to a solution to prevent the inward flow of water across a semipermeable membrane - transpiration: the loss of water by evaporation in terrestrial plants, especially through the stomata; accompanied by a corresponding uptake from the roots - water potential: the potential energy of water per unit volume; designated by ψ Water Potential Plants are phenomenal hydraulic engineers. Using only the basic laws of physics and the simple manipulation of potential energy, plants can move water to the top of a 116-meter-tall tree. Plants can also use hydraulics to generate enough force to split rocks and buckle sidewalks. Water potential is critical for moving water to leaves so that photosynthesis can take place. Questions: A plant cell is found to have a solute potential of 0.5 MPa and a pressure potential of 0.3 MPa. If the cell were placed in a large beaker containing a new solution (at atmospheric pressure and with an solute potential of - 0.4 MPa, how does this new solution relate to the cell? A) The solution is hypotonic to the cell. B) The solution is isotonic to the cell. C) The solution is hypertonic to the cell. D) There is not enough information to answer this question. In this solution , what would happen to the water? (Assume that no solute can cross the plasma membrane in either direction) A) Water would enter the cell, B) Water would leave the cell. C) Water would not move in either direction. D) There is not enough information to answer this question #NikolaysGeneticsLessons #Education #HomeRevise #howOpeningAndClosingOfStomataTakesPlace #whatDoGuardCellsDo #stomataUnderMicroscope #stomatalTranspiration #leaves #photosynthesis #epidermis #guardCells #StomatalIndex #stomata #eLearningVideos #whatIsStomata #openingAndClosingOfStomata #stomataInHindi #stomataDefinition #stomataFunction #stomataInPlants #GuardCell #Respiration #waterPotential #Osmosis #Botany #biology #bio #chemistry #chem #flaccid