When using the 20 MWCO membrane, why sodium and chloride ions didn't diffuse through the membrane? Select one: The charge of sodium prevented it from diffusing. The membrane pore size was too small. It needs a steeper concentration gradient to diffuse. There wasn't enough time for diffusion to occur.
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- 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.…One of the curves below describes nonmediated diffusion, and the other describes facilitated transport. Which is which? Explain your choices. Concentration difference across membrane Rate of transport -Statement 1: The direction of diffusion of a solute across a membrane is determined by its concentration gradient and always moves toward equilibrium. Statement 2: In passive transport, solutes move down the gradient from a region of low concentration to a region of high concentration. A Both statements are true. Both statements are false. C) Statement 1 is true. Statement 2 is false. Statement 1 is false. Statement 2 is true.
- Diffusion and osmosis classification Classify the following characteristics based on whether they are describing diffusion, osmosis, or both. Diffusion Results in an Can occur with equal distribution of solute molecules or without a membrane Always involves the movement of water Requires a semi-permeable membrane Osmosis Involves the movement of gases, ions, and small water soluble molecules Passive form of movement that requires no energy Moves from areas of high concentration to low Both Diffusion and Osmosis Responsible for gas exchange in the lungs concentration A 3 of 15 Next > Cation to open the document "Epicinstaller-13.0.0-fortnite-a8e4f12cada646caa706d8be407be69f (3).msi". tv 22One of the curves in this graph describes nonmediated diffusion, and the other describes facilitated transport. Which is which? Explain your choices.Thinking back to the "effect of concentration" lab, what did your data indicate? The concentration gradient does not have an effect on the rate of diffusion. An increase in the concentration gradient will cause the rate of diffusion to decrease. An increase in the concentration gradient will cause the rate of diffusion to increase .
- Which of the following statements is TRUE of diffusion? Diffusion of particles along the concentration gradient will occur until particles are equally distributed in all areas of the solution. Diffusion of particles along the concentration gradient will occur until the particles move fully from one side of the solution to the other. Diffusion of particles against the concentration gradient will occur until random motion occurs. Diffusion of particles against the concentration gradient will occur until all the particles have dissolved. Carl is examining an onion root tip cell under a microscope. Based on his observations, Carl proposes that the onion root tip cell has completed interphase and is now in the first phase of mitosis. Which of the following pieces of evidence would best support Crisanto’s claim? The cell’s chromosomes are aligned across the metaphase plate. Separated sister chromatids are being pulled towards…In what direction is there a net movement of particles along their concentration gradient? Would your answers be different for facilitated diffusion compared with simple diffusion?Two students are discussing the effect of concentration gradient on diffusion. Student A says, “The higher the concentration gradient, the slower the rate of diffusion.“ But student B thinks the opposite. Who is correct?
- Which of the following does not characterize the different factors that affects the rate of diffusion? Mass of molecules diffusing Solute density Temperature Extent of concentration gradientThe surface area to volume ratio affects the ability of the cell to exchange nutrients and waste products with the outside environment. Many factors affect the movement of molecules across the cell membrane, including membrane thickness, temperature, pressure, concentration gradient, molecular mass, distance travelled, solvent properties and surface area of the cell. In general, according to Einstein’s approximation equation (Equation 1), diffusion time is inversely proportional to the to the diffusion coefficient (D), where t is time and x is distance travelled. The diffusion coefficient is unique to each type of molecule and is determined experimentally. Waste products such as carbon dioxide (CO2) pose a unique problem to cells as their accumulation may be lethal. Exchange with the external environment is dependent upon the distance the waste must travel; for a round cell this will be up to half the cell diameter. Using the diffusion coefficient (D) for carbon dioxide (1.97 × 10-5…Compare and fully explain simple diffusion and facilitated diffusion of solutes across a plasma membrane. How are they similar and how are they different? Your answer must include a discussion of concentration gradients, transport proteins and energy (ATP) requirements. Describe the general properties of molecules/solutes that exhibit each type of diffusion.