ACTIVITY 1: Simulating Dialysis (Simple Diffusion) Answers 1. The molecular weight of urea is approximately 60. Which of the membranes can it pass through? a. 50 MWCO membrane b. 100 MWCO membrane c. 200 MWCO membrane d. Both the 100 and 200 MWCO membranes D. Both the 100 and 200 MWCO membranes 2. True or False: A solution containing glucose will diffuse faster through a 200 MWCO membrane if it is heated. True 3. The molecular weight of carbon C is 12; the molecular weight of hydrogen
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the solution that contained AgNO3 in the sucrose concentration of 0.4M (Figure 2). In addition‚ the Elodea cells seemed to shrink as the sucrose concentrations’ increased without AgNO3. Therefore the results were that with the addition of AgNO3‚ osmosis was not inhibited. The internal osmotic pressure at different sucrose concentrations was 0 for 0.0M‚ 2.43 for 0.1M‚ 4.85 for 0.2M‚ 7.28 for 0.3M‚ 9.71 for 0.4M‚ 12.14 for 0.5M‚ 14.56 for 0.6M‚ and 24.27 for 1.0M (Table
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FL 32073 BSC2085C - Anatomy and Physiology I - 333738 Fall Term 2010 Larry Chad Winter lwinter@fscj.edu Submitted - 9/18/2010 NAME Mark Graham Cell Transport Mechanisms and Permeability Activity 1: Simulating Dialysis (Simple Diffusion) Chart 1 – Dialysis Results |Membrane (MCWO) | |Solute |20
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area of higher concentration to the area of lower concentration. 2. osmosis‚ turgor pressure: Osmosis is the diffusion of water molecules across a cell membrane. When osmosis results in water molecules entering a plant cell‚ the molecules exert a pressure against the cell wall‚ called turgor pressure. 3. hypertonic‚ plasmolysis : hypertonic solution has a higher solute concentration than the cytosol of a cell. In a hypertonic solution a plant cell will lose water and shrink away from the cell
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concentration of molecules in the bottle to a lower concentration of molecules in the air. Osmosis is a type of diffusion. It involves movement of water through a differentially permeable membrane from a region of high concentration (of water molecules) to a region of lower concentration (of water molecules). We define 3 types of solutions based upon osmotic activity. In an isotonic solution‚ the solute concentration is the same on both sides of the membrane so there is no net
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2. Define the terms hypertonic‚ hypotonic‚ and isotonic solution. * Hypertonic: Having increased pressure or tone‚ in particular. * Hypotonic: Having reduced pressure or tone‚ in particular. * Isotonic solution: a solution having the same osmotic pressure 3. Explain the similarities and differences between diffusion and osmosis. Both are the movement of a substance from an area of high concentration to an area of low concentration. But osmosis is the movement of water
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environment‚ osmosis will occur. The structure of these cells determines the response to the difference in gradient‚ whether this be lysis (the explosion of cells due to the sudden increase in water pressure within the cell) in animal cells or turgor pressure (the pressure created by the increase in water pressure within the cell) in plant cells. Turgor pressure prevents further osmosis‚ which causes the water potential outside the cell to be lower than that inside the cell. When placed in a hypertonic environment
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(Lab – Chapter 13) Introduction: In this lab‚ we are going to observe the difference in freezing point between pure water and salt water. We will also observe the permeability of an egg shell membrane and dialysis tubing‚ acting in place of a human cell‚ when placed into a hypertonic or hypotonic solution. We will observe the changes in size‚ shape‚ and characteristic. Materials and Methods: First we begin this experiment by making an ice bath in the 100mL beaker. I filled a test tube with
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1. a. List four cell structures that were common to both plant and animal cells. (4 points) b. What structures were unique to plant cells? (2 points) c. What structures were unique to animal cells? (2 points)--Answer below: a. 1. Rough ER 2. Smooth ER 3. Golgi Apparatus 4. Nucleus b. 1. Chloroplast 2. Cell walls 3. Vacuole c.
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Lab 1: The Scientific Method Lab 2: Writing a Lab Report Lab 3: Data Measurement Lab 4: Introduction to the Microscope Biological Processes: Lab 5: The Chemistry of Life Lab 6: Diffusion Lab 7: Osmosis Lab 8: Respiration Lab 9: Enzymes The Cell: Lab 10: Cell Structure & Function Lab 11: Mitosis Lab 12: Meiosis Lab 13: DNA & RNA Lab 14: Mendelian Genetics Lab 15: Population Genetics
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