Investigating the Water Potential of a Potato. I have been asked to investigate the water potential of a potato. During my investigation I will not actually be able to measure a value for‚ as it is a pressure value (kPa). Osmosis is a special form of diffusion involving only water molecules. It is defined as "The passage of water from a region of high water potential to a region of low water potential through a partially permeable membrane" Definition of Water Potential. The potential for water
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References: CITED Edition. McGraw-Hill‚ USA. p. 208.Meyertholen‚ E. (n.d.). Diffusion. Retrieved on July 30‚ 2012 fromhttp://www.austincc.edu/~emeyerth/diffuse2.html Nave‚ R. 2008. Diffusion and Osmosis. Retrieved on July 30‚ 2012 from http://hyperphysics.phy-astr.gsu.edu/hbase/kinetic/diffus.html Silberberg‚ M. S. 2000. Chemistry 2nd Edition. McGraw-Hill‚ USA. p. 205. Traverso‚ M. 2004. Diffusion and Concentration Gradients. Retrieved on July 31
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Membranes allow the diffusion by letting certain molecules pass through it. Small pores in the semi (selectively) permeable membranes‚ which flow only towards one way‚ allow the process of osmosis to continue. These pores let only tiny molecules to go through them. One example might be the dialysis tubing in which a membrane made of a regenerated cellulose fibers formed into a flat tube. If two solutions containing dissolved substances of different
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molecules in or out of their membrane. Some require no energy to do so (passive transport) while others require energy to be processed through (active transport). There is also the transportation of water across a membrane‚ which has its own term of osmosis. Too much of something can be taken in‚ or too little enters. This especially happens to plants‚ who require water (and sun) to live. Not enough water‚ as herbalists or any plant lover will know‚ will cause the plant to wilt. However‚ why consider
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Investigation into finding out the Effect of the effect of osmosis In potato cells Introduction I am doing an experiment to find out the effect that osmosis has on Water solution and a Sugar solution. Osmosis is a process which water moves from an area of low concentration to an area of high concentration. I am going to record my results to see if osmosis occurs in water solution of sugar solution. Apparatus In this experiment I would need; - 1) 3 test tube 2)
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IB HL BIOLOGY Dialysis Lab: Exploring Osmosis and Diffusion Through A Membrane Introduction: Dialysis is the flow of certain solutes through a semi permeable membrane. Dialysis is usually used on patients with failing kidneys to clinically purify blood in their kidneys‚ or other regions of their bodies. The dialysate contains waste matter that flows from the blood our of the dialysis tubing. Question/aim of lab: To test the solutions inside and outside the dialysis tubing with Benedict’s
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cross the bilayer are they able to move molecules and ions in and out of the cell. If a molecule is to be transported from an area of low concentration to an area of high concentration‚ work must be done to overcome the influences of diffusion and osmosis. A vital active transport process that occurs in the electron transport process in the membranes of both mitochondria and chloroplasts is the transport of protons to produce a proton gradient. This proton gradient powers the phosphorylation of ATP
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Biology Investigation: Effect of different concentrations of sucrose solutions on the mass of potatoes Research question Is the mass of potatoes going to be smaller or bigger in different sucrose concentration? Introduction Osmosis is a process that occurs at a cellular level that entails the spontaneous net movement of water through a semi-permeable membrane from a region of low solute concentration to an area of high solute concentration in order to equalize the level of water
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liquids or gases. 4. Cell membrane the semi permeable membrane surrounding the cytoplasm of a cell. 5. Solute concentration a component of a solution: in a solution‚ the dissolving substance is called a solvent whereas the dissolved substance 6. Osmosis the tendency of a fluid‚ usually water‚ to pass through a semipermeable membrane into a solution where the solvent concentration is higher‚ 7. Active transport the movement of ions or molecules across a cell membrane into a region of higher
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Osmosis Lab Report The essential focus of the experiment was to acquire data for the mass change resulting from osmosis in order to determine the carbohydrate solution of the carrot cells. The carrots were a vegetable used within the experiment with a carbohydrate solution around .5 M. The hypothesis is if there are carrots in different carbohydrate solutions then there will be a percent change in mass. The carrots have large vacuoles that hold water‚ this allows the mass to increase when the hypertonic
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