What would likely happen to human cells (with a total solute concentration equivalent to ~0.9% NaCl) if we submerged them into a saline solution with 5% NaCI? Nothing Turgidity Plasmolysis Lysis Crenation
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- The movement of water through a semipermeable membrane from a region of lower solute concentration to a region of higher solute concnetration is called _________ osmosis diffusion solubility gradientcompared to bag of 0.9% NaCl are dH20, 0.9% solute, 5% solute, isotonic, hypertonic or hypotonicSome cells lining tubules in the kidneymaintain normal cell volume bysynthesizing organic solutes. Where inthe kidney would you expect to findthese cells? Explain.
- Please order the following types of solute diffusivity from largest to smallest. 1. D pore: Diffusivity of solute in a pore 2.De: Effective diffusivity of solute through a heterogeneous membrane material 3. D AB: Diffusivity of solute in water 4. D mi Diffusivity of solute through a membrane pore relative to the bulk concentrationA 0.10 M NaCl solution is (hypertonic/hypotonic/isotonic) to a 0.1M glucose solution.Table 4. 1.a Diffusion through a Semi-permeable Membrane. Observation Before Immersion After 15 minutes of Immersion Starch solution in the cellophane Iodine in the beaker Table 4.1.b Reaction of Starch to lodine Solution Starch in Iodine Solution Table 4.2. Osmosis Solutions Test Tube 1: 0.9% NaCl (Isotonic) Observe Shape of Red Blood Cells Drawing Test Tube 2: Distilled Water (Нурotonic) Test Tube 3: 3% NaCl (Hypertonic) Conclusion
- In an investigation of osmosis, apple cores were submerged in different molarity solutions to determine the unknown osmolarity of the apple. To determine the molarity five uniform apple cores were massed before submerging them in different molarity solutions. After 24 hours the apple cores were massed again. Then the percent change in mass was determined for the five uniform apple cores in each molarity solution. (b) Identify the osmolarity of the apple.What are the similarities and differences between themathematical equation for the rate of simple solute diffusion andthe equation for the rate of osmosis?Whereas electrical currents are carried by electrons in copper wire,they are carried by ions in aqueous solutions. Explain how anactive-transport mechanism can create an electrical current acrossa membrane.
- Osmosis is often defined as the flow of water through a semipermeable membrane, from a dilute solution to a more concentrated solution. Video experiment #1 – saturated sucrose/dialysis tubing/water osmosis from U Mich. https://youtu.be/pCupvFGN4bw A saturated solution of sucrose-containing a red dye is separated from water by dialysis material. What happens to the volume of sucrose solution during the experiment? How do you know that the sucrose solution did not flow into the beaker of water? (Give evidence from your observation of the experiment.) Diffusion, Osmosis, Dialysis video: https://youtu.be/tHzkRtzVmUMDialysis, the flow of both solvent and small molecules or ions through a dialyzing membrane, is important clinically in the operation of the artificial kidney machine.In an investigation of osmosis, apple cores were submerged in different molarity solutions to determine the unknown osmolarity of the apple. To determine the molarity five uniform apple cores were massed before submerging them in different molarity solutions. After 24 hours the apple cores were massed again. Then the percent change in mass was determined for the five uniform apple cores in each molarity solution. (c) Describe the environmental conditions taking place in each of the six solutions with the apples refer to picture for tableFor most neurons, the extracellular concentration of chloride ions (Cl-) is 108 mM, whilethe intracellular concentration of Cl- is 5 mM.If the plasma membrane becomes more permeable to Cl-, would there be Clinflux or Cl- efflux at an RMP of -70 mV? Why?