1 of 27 © Boardworks Ltd 2009 2 of 27 © Boardworks Ltd 2009 Waste removal Several organs are important in removing waste from the body. The lungs remove carbon dioxide. The skin provides a surface for small amounts of water and salt to move out of the body. 3 of 27 The liver converts excess protein into urea. The kidneys remove unwanted substances such as urea‚ excess water and salt. © Boardworks Ltd 2009 What is urea? Excess amino acids in the body are broken down by the liver‚ producing
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simple sugars. Now‚ when the iodine is added‚ no color change exist. Instruments and materials used: 1.) Dialysis bags x2 2.) Beakers 3.) Test tubes 4.) Water bath 5.) Iodine solution 6.) Starch solution 7.) String x4 8.) Dropper 9.) Thermometer 10.) Salty water for the easy use of the dialysis bags Set Up: For the experiment we put the starch in a dialysis bag and close it up tightly with strings‚ then insert them into a beaker full of iodine solution For the next set
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of water particles and is one of the passive transport that the molecules try to reach equilibrium is reached to the concentration. Introduction: In this experiment‚ the experimenter tried to organize the order of 5 unknown solutions by using dialysis tubing lab. The 5 solutions were put into each tubing bag that were all tied up and placed into each beaker of water and waited to look for the change in masses of each bag. The type of solution that were put in the tubing bag are the independent
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Osmosis Katy Hunter 10-26-2012 Abstract: The objectives of this lab was to be able to create models of cells with the dialysis tubing to show us how the plasma membrane is selectively permeable‚ to study the effects of osmosis on a model cell‚ and to foresee the effect of solute concentration on osmosis. In order to achieve these objectives‚ we had to fill the dialysis tubing with either water‚ or different amounts of sucrose. We then tied off the tubes and put them into beakers of distilled
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Direction and concentration gradients Bradley Benton ABSTRACT In this experiment‚ we will investigate the effect of solute concentration on osmosis. A semi‐permeable membrane (dialysis tubing) and sucrose will create an osmotic environment similar to that of a cell. Using different concentrations of sucrose (which is unable to cross the membrane) will allow us to examine the net movement of water across the membrane. INTRODUCTION A major determinant of diffusion in a biological system is membrane
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preparing for the next step‚ place the dialysis tubing in cup 1 and let it soak for about 5 minutes. Use the “DW” pipet to add 4 mL of distilled water to the graduated cylinder. Add 2 mL of starch solution and 2 mL of 20% glucose solution to cup 2 and mix thoroughly with the glass rod. Next‚ cut 2 rubber bands in one place and set aside. By this time‚ the dialysis tubing should be ready to be removed from cup 1. Set cup 1 aside for future use. “Fold the dialysis tubing about 1 ½ cm from the end. Tie
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from http://www.nhs.uk/Conditions/Oedema/Pages/Introduction.aspx (accessed 28.04.2015) Patient.co.uk (2015) ‘Oedema’ Available from http://www.patient.co.uk/health/oedema-swelling (accessed 28.04.2015) NHS Choices (2015) ‘Dialysis’ Available from http://www.nhs.uk/conditions/Dialysis/Pages/Introduction.aspx (accessed 19.5.15) Kidney Research UK (2015) ‘Haemodialysis’ Available from http://www.kidneyresearchuk.org/page.aspx?pid=944 (accessed 19.5.15) WebMD (2015) ‘Coping emotionally after an organ transplant’
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6 M‚ 0.8 M‚ and 1.0 M. Then we obtained six pieces of dialysis tubing from the beaker of water and tied a knot in one end of the tubing. Afteer‚ we opened one piece of dialysis and poured 25 ml of distilled water into the tubing and then tied of the other end securely leaving room for expansion. Then blotted the tube dry and placed it in the cup labeled “water”. Then we repeated the same process witht eh remaining five pieces of dialysis tubing‚ adding a different sucrose solution to each bag:
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experiment‚ the weight of the beaker/dialysis tubing changed and the only logical explanation was that diffusion of water had occurred. Osmosis is the diffusion of water. Depending on which was heavier (the beaker or the dialysis tubing) after the experiment was performed‚ the direction of water diffusion was apparent. If the beaker was heavier‚ then that implies that the water diffused from the dialysis tubing to the beaker. In contrast to this process‚ if the dialysis tubing were heavier after the experiment
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important ones. You need a cup to put 150mL of distilled water in cup number one. Then you soak the dialysis tubing in this cup for five minutes. Then you add in the graduated cylinder‚ 4mL of distilled water‚ 2 mL of starch solution‚ and 2 mL of the glucose solution‚ then pour it into cup number two. Then use the glass stirring rod to stir the solution in cup two. Then remove the dialysis tubing from cup one‚ set the cup aside for later‚ tie up one end tightly. Then test the tubing with distilled
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