Dialysis is a process of selective diffusion through a membrane. It is usually used to separate low-molecular-weight solutes which diffuse through the membrane from the colloidal and high-molecular-weight solutes which do not. What are the factors affecting dialysis.
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- Can sucrose pass freely through the membrane of a dialysis tube? Explain using examples. (Biochemistry)A dialysis bag contains 10% starch solution. The dialysis bag is placed in a beaker filled with deionized water. Ten drops of Starch indicator (iodine solution, KI) solution is placed into the deionized water. The water turns a yellowish-brown color, however, you notice that the starch solution begins to turn black. Describe what is happening with respect to the diffusion of starch.A kidney patient is receiving dialysis to adjust the solutes in his blood to normal values. Assume the dialysis bag is permeable to urea, sodium, potassium, and bicarbonate to determine which way each molecule would move. Normal Blood Values: Urea: 7-20 mg/dcl Potassium: 3.6-5.2 mg/dcl Sodium: 135-145 mg/dcl Bicarbonate: 23-30 mg/dcl Renal Patient's Blood Urea: 30 mg/dcl Potassium: 7 mg/dcl Sodium: 128 mg/dcl Bicarbonate: 27 mg/dcl Using the information above, state whether the concentration of solutes in the dialysate solution should be greater than, lesser than, or equal to the concentration of solutes in the patient's blood. Urea: [ Select ] Potassium: [ Select ] Sodium: [ Select ] Bicarbonate: [ Select ] > >
- Can water pass freely through the membrane of a dialysis tube? Explain. (Biochem)Blood volume must be restored in a person who has lost large amounts of blood due to serious injury. This is often accomplished by infusing isotonic NaCl solution into the blood. Why is this more effective than infusing an isoosmotic solution of a penetrating solute, such as urea?"Transport by transporters can be either active or passive, whereas transport by channels is always passive" is true or false.
- Which process—diffusion, osmosis, or filtration—is utilized in the following situations? a. Injection of a drug that is hypertonic to the tissues stimulates pain. b. The urea concentration in the dialyzing fluid of an artificial kidney is decreased.What concentration of sucrose do you estimate would yield no change inpressure? Why is this biologically significant? Explain in your own words. Do not copy and paste from google. Please refer to your data/graphs on Dialysis tubing cell osmosis.Which of the following occurs when erythrocytes are transferred from an isotonic solution to a hypertonic solution? Water leaves the cell and results to crenation. B Water leaves the cell and results to osmotic lysis. C) Water enters the cell and results to crenation. D Water enters the cell and results to plasmolysis.
- A student designed an experiment to test whether different concentration gradients affect the rate of diffusion through dialysis tubing. Four different solutions (0% NaCl, 1% NaCl, 5% NaCl, and 10% NaCl) were tested under identical conditions. Twenty mL of each solution was placed into separate dialysis tubing that is permeable to Na+, Cl-, and water. Each bag was placed in a separate beaker and covered with distilled water. The concentration of NaCl in the water outside of each bag was measured at 40-second intervals. The graph below shows the results from the 5% bag: Concentration of NaCl Outside of Dialysis Bags Concentration of NaCl (mg/L) 400 320 240 160 80 0 40 80 Time(seconds) 120 5% Solution 160 a. Describe the process of diffusion through the dialysis tubing. b. If you were to design a different experiment testing rates of diffusion, identify experimental procedures. c. Analyze that data in the graph and describe the results. Provide reasoning to justify your answer. d.…Inside a beaker, dialysis membrane A is filled with a 50% glucose solution and dialysis membrane B is filled with a 50% NaCl solution. Both bags are put into beakers containing 100% water. Which of the following choices is correct? (hint: the dialysis membrane is only permeable to water) a) For both solutions, it is isosmotic, and hypotonic so water flows into the membrane.b) For both solutions, it is isosmotic, and isotonic so there is not net flow of waterc) For both solutions, it is hyposmotic, and hypotonic so water flows into the membraned) For both solutions, it is hyperosmotic, and hypertonic so water flows into the membranee) For both solutions, it is hyposmotic, and hypertonic so water flows out of the membraneSelect the best answer or answers from the choices given: A physiologist observes that the concentration of sodium inside a cell is decidedly lower than that outside the cell. Sodium diffuses easily across the plasma membrane of such cells when they are dead, but not when they are alive. What cellular function that is lacking in dead cells explains the difference? (a) osmosis, (b) diffusion, (c) active transport (solute pumping), (d) dialysis.