• Review Sheet
    . Explain why the rate increased. How well did the results compare with your prediction? a. When the glucose concentration increased, this increased the concentration difference between the two sides of the membrane. More molecules were available to pass through the membrane to reach equilibrium...
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  • Chemistry Final Exam Study Guide
    partial pressures * Ptotal = X1P˚1 + X2P˚2 Osmotic Pressure (∏) – * Osmosis – the movement of solvent across a semipermeable membrane toward the solution with the higher solute concentration * Osmotic pressure – the external pressure that must be applied to stop osmosis Calculating...
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  • Physio Ex 9.0 Activity 1 Cell Transport Mechanisms and Permeability
    Permeability: Simulating Osmotic Pressure 1.Explain the effect that increasing the Na+ Cl- concentration had on osmotic pressure and why it has this effect. How well did the results compare with your prediction? By increasing the Na+Cl- concentration we...
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  • Exercise 1
    osmotic pressure with increasing solute concentration. 3. If the solutes are allowed to diffuse, is osmotic pressure generated? 4. If the solute concentrations are equal, is osmotic pressure generated? Why or Why not? Activity 5: 1. In the initial trial the number of Na+ -K+ pumps is set to 500...
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  • Diffusion of Molecules
    . Describe a selectively permeable membrane, and explain its role in osmosis. 5. Define hypotonic, hypertonic, and isotonic in terms of relative concentrations of osmotically active substances. 6. Discuss the influence of the cell wall on osmotic behavior in cells. 7. Explain how incubation...
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  • Lab Cell Membrane
    of Na+Cl- . RESULTS DISCUSSION 7. Explain the effect that increasing the Na+Cl- concentration had on osmotic pressure and why it has this effect? How did the results compare with your prediction? When the Na+Cl- concentration is increased the molecules show an increased osmotic pressure...
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  • Physioex 9 exercise 1
    carrier proteins. Therefore it is completely independent from the glucose transport. As a result, adding Na+CI- has no effect on the glucose transport rate. Simulating Osmotic Pressure 1. Explain the effect that increasing the Na_Cl_ concentration had on osmotic pressure and why it has this...
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  • lalalala
    . The amount of osmotic pressure is directly related to the concentration of the solute. That is because more concentrated the solutions have greater potentials for dilution. 7 REFERENCES Chang, R., (2007). Chemistry. (10th ed). New York: McGraw-Hill McGraw-Hill Concise...
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  • Determining the Water Potential of Potato Cells
    and measured with a barometer. Water potential is abbreviated by the Greek letter psi (() and has two major components: osmotic potential (((), which is dependent on solute concentration, and pressure potential ((p), which results from the exertion of pressure—either positive or negative—on a...
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  • Cell Transport Mechanisms and Permeability
    membrane. 5. List three examples of passive transport mechanisms. Diffusion, Facilitated Diffusion, and Osmosis. 6. Describe the relationship of solute concentration to solvent concentration in osmosis. The relationship is this: when the solute concentration is higher, water potential is lower, and...
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  • Osmosis and Diffusion
    relationships that can occur between two solutions. When two solutions have equal solute concentrations, they are isotonic and no net movement of solute occurs. There is also no net movement of water. If the two solutions differ in solute concentrations, they will either be hypertonic or hypotonic. The...
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  • History
    estuaries experience dramatic changes in salt concentration over a short time span, as tides fluctuate and fresh water mixes with salt water. Organisms that need to withstand great fluctuations in salinity are said to be euryhaline. * Allowing the body’s osmotic pressure to vary with the...
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  • Biology Core Notes
    concentration varies depending on the animal and its environment Uric acid: excreted as a white paste- reptiles, birds, insects, land snails Ammonia: earthworms, tadpoles and amphibians, aquatic snails Urea: frogs, earthworms ▪ use available evidence to explain the relationship between the conservation...
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  • Physio Ex 9.0 Exercise 1
    increase the osmotic pressure. because water needs to diffuse to the higher concentration gradient until equilibrium is reached. I predicted that it will not have an effect on the glucose transport. Activity 3 8. Explain the effect that increasing the Na+ Cl- concentration had on osmotic pressure and...
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  • Cell Transport Mechanisms and Permeability
    Osmotic Pressure Begin by clicking on the Experiments Menu and then selecting osmosis. Then place the 20 MWCO membrane between the beakers. Dispense 8.00mM of NaCl solution into the left beaker, and deionized water into the right. Set the timer for 60 minutes, and then press start. Observe the pressure...
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  • CHOICE B
    membrane is placed between the beakers. In beaker A is a solution of 20% solute. In beaker B is a solution of 30% solute. Which has a more negative osmotic potential? What will be the point of equilibrium (no net osmosis)? 4. Explain the main difference between facilitated diffusion and...
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  • Biology Notes- Maintaining a Balance
    dehydration or cell bursting) * Enzymes also require specific conditions of functioning, some of which could relate to the levels of water and solutes in cells. * This is why the concentration of water must be kept constant: To ensure the proper functioning of living cells. * Explain...
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  • Forward (Direct) Osmosis
    process. The data in Figure 2 indicate that for similar osmotic pressure differences between bulk feed and draw solution, higher concentration feed solution produced lesser water flux. When the draw solution was 4M fructose and the feed was 0.5M, 1M, 2M, respectively, the lower the feed Copyright ©2006...
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  • Hsc Biology Great Notes!
    cross the cell membrane by active transport. * As sugars enter the phloem the concentration of phloem sap increases and the. This causes the entry of water by osmosis from the surrounding cells. This resulting pressure causes water and dissolved solutes to flow towards a SINK...
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  • Excercise
    zero. Ψs is solute or osmotic potential, the contribution made by dissolved solutes. It is always negative in sign. The addition of solutes lowers the water potential of the solution proportionally. Ψp is pressure or turgor potential and is related to the counter-pressure exerted by the cell...
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