Simulating Dialysis (Simple Diffusion). Which solute(s) were able to pass through the 20 MWCO membrane? None of the solutes were able to pass through the 20 MWCO membrane. A possible reason to why none of the of these solutes were able to pass through was because the solutes could have been too big to be transported. According to your results‚ which solute had the highest molecular weight? The solute that had the highest molecular weight was Albumin. Which solute displayed the highest rate of diffusion
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of Solutes and Water Across a Membrane Brittany Bacallao Nova Southeastern University Abstract: This experiment gave a visual understanding of osmosis and diffusion. The first experiment proved that solutes would move down a concentration gradient if permeable to the selective membrane. The second experiment proved different solute concentrations affect the movement of water‚ depending on the solute concentration inside the cell. The purpose of this lab was to look for different solutes that
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MOVEMENT ACROSS MEMBRANES Intracellular fluid Extracellular fluid Pond water Blood plasma K+ A- ClNa+ Cl+ K+ Na+ Cl- Na+ Na+ Gill epithelial cell Intestinal epithelial cells Cl- Cell membrane Anionic proteins (a) Ion concentration inside a single animal cell (b) Ion concentration across gill epithelium of a freshwater fish Blood capillary Intestinal lumen Glucose from meal Cross section of small intestine (c) Glucose transport across intestinal epithelium into
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For the preparation of the filtrate solution at the beginning of the class our Instructor‚ Marshall Douglas added about four to five strawberries in the blender along with 100 ml of detergent/ enzyme/ salt solution. They were blended until thoroughly homogenized if foaming occurred more detergent solution was added to prevent it. Then the blended solution was poured into a beaker and left to incubate at 60C for 15 minutes. Also‚ the mixture solution was cooled on ice for 5 minutes and filter through
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boyfriends. One of them is an Army. Others are the Air force. 14. We can ask some teachers to explain what this tools for are 15. Some kids are playing football in the backyard 16. Some papers was corrected by the teacher 17. I don’t have any clothes in my cupboard. Some clothes was taken by my sister and others by my sister in-law 18. I have saved some money instead of spending all of it 19. He has made some friends during the summer camp 20. Siti hides some secrets about her
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Nov 19/12 Solute Concentration of Potatoes Block 2-2 Purpose: To determine the concentration of solute in the potato’s cytoplasm by measuring the change in mass after the process of osmosis. Materials and Equipment: Refer to Biology 12 Lab Manual – Investigation 13 Procedure: Refer to Biology 12 Lab Manual – Investigation 13 Data and Observations: The Potatoes change in mass after the process of Osmosis Test Tube # | Concentration
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Experiment 5 Title: Membrane Permeability Objectives: 1. Define solvent‚ solute‚ solution‚ selectively permeable‚ diffusion‚ osmosis‚ concentration gradient‚ equilibrium‚ turgid‚ plasmolyzed‚ plasmolysis‚ turgor pressure‚ tonicity‚ hypertonic‚ isotonic‚ hypotonic; 2. Describe the effects of hypertonic‚ isotonic‚ and hypotonic solutions on Elodea leaf cells and onion scale leafs. Introduction: Membrane permeability is a quality of a cell’s plasma membrane that allows substances to pass in
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selectively permeable membrane that only allows certain molecules to diffuse though (Lab Manual 7e‚ 2010). Diffusion or osmosis occurs until dynamic equilibrium has been reached. This is the point where the concentrations in both areas are equal and no net movement will occur from one area to another. If two solutions have the same solute concentration‚ the solutions are said to be isotonic. If the solutions differ in concentration‚ the area with the higher solute concentration is hypertonic
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1. Appears as grape-like clusters when viewed through a microscope‚ and has large‚ round‚ golden-yellow colonies‚ often with hemolysis‚ when grown on blood agar plates. 2. Microorganisms that are used to assess the microbial quality of swimming pool and similar environments include heterotrophic plate count – HPC (a general measure of non-specific microbial levels)‚ faecal indicators (such as thermotolerant coliforms‚ E. coli)‚ Pseudomonas aeruginosa‚ Staphylococcus aureus and Legionella spp. HPC
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Organ systems are specialised so that they can maximise the amount of materials exchanged over their membranes. The ways that effectiveness of an exchange surface can be increased are: Large surface area: a larger surface area means that more diffusion can occur at once. Thin membrane: this speeds up the exchange because the diffusion path is shorter so the molecules have less distance to travel. Efficient blood supply: In animals the blood system is very efficient for transporting a variety
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