Under what conditions do cells gain or lose water? Did water move into the cell or out of the cell while it was surrounded by hypotonic solution? The water moved into the cell‚ because there was less water inside the cell than outside (there were fewer water molecules inside). 2. In which direction did the water move though the cell membrane when the cell was surrounded by the hypertonic solution? The water moved out of the cell because there was a higher concentration of water inside
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(Online Campus) Amy Sullivan Introduction: Membrane Transport • What is membrane transport • Types – – – – Diffusion Osmosis Active Transport Endocytosis/Exocytosis Photo Courtesy Of: http://hyperphysics.phy-astr.gsu.edu/hbase/biology/celmem.html Osmosis • Example: A semipermeable membrane bag containing a 30% sugar solution is placed in a beaker of pure water. – Diffusion or osmosis? – What should we expect to see? • Direction of molecular movement Photo Courtesy Of: https://internationalgcsebiology
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Material and Methods * Osmosis : -thistle funnel tube -dialysis tubing sack -saturated NaCl w/food coloring -beaker with distilled H2O The experiments begins with the construction of a simple osmometer by obtaining pre-soaked length of tubing ‚opened and tied at the end. The tube is filled with saturated NaCl solution (with added food coloring) and the thistle is inserted in the dialysis tubing. The dialysis tubing is sealed to the thistle funnel with dental floss and placed in a beaker
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enzymes in the chloroplasts (mainly mesophyll cells called palisade cells). How It Works: Carbon Dioxide + Water  Glucose + Oxygen 6CO2 + 6H2O  C6H12O6 + 6O2 - Water from the soil travels (by osmosis) through root hair cells to the xylem vessels then passes into the mesophyll cells (palisade) to the chloroplasts. - Carbon dioxide from air diffuses into leaves through stomata then it moves through air spaces to reach the mesophyll cells then to
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DIFFUSION= The movement of atoms or molecules from an area of higher concentration to an area of lower concentration. Atoms and small molecules can move across a cell membrane by diffusion. OSMOSIS= Diffusion of fluid through a semipermeable membrane from a solution with a low solute concentration to a solution with a higher solute concentration until there is an equal concentration of fluid on both sides of the membrane. SELECTIVE PERMEABLE MEMBRANE=a membrane (as a cell membrane) that allows
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Microscope and Viewing a Letter “e” 39 Laboratory 4: Cell Structure & Function 43 Pre-Lab Assignment 43 This page left intentionally blank 44 Lab 4: Cell Structure & Function 45 Objectives 45 In-Lab Report Sheet 49 Laboratory 5A: Diffusion & Osmosis – Transporting Substances Across Membranes 55 Objectives: 57 In-Lab Report Sheet 61 Pre-Lab Assignment 65 Objectives: 67 In-Lab Report Sheet 71 Lab 6: Photosynthesis and Cellular Respiration 76 Pre-Lab Assignment 76 Lab 6: Photosynthesis
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Online Lab: Carbon Transfer Through Snails and Elodea Record answers in blue‚ bold font Go to http://www.classzone.com/cz/books/bio_07/resources/htmls/virtual_labs/virtualLabs.html (If the link does not work‚ go to http://www.classzone.com/cz/index.htm Enter Science‚ High School; NC; Go Click Biology 2008 (book on left) Click Virtual Labs (left side 2nd row)...continue with directions below) Click on Carbon Transfer Through Snails and Elodea. Read through the directions and complete
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and oxygen; cellular respiration puts carbon dioxide in the air. Both of these processes were studied during the experiment. In the experiment‚ the tube with both the elodea and the snail had the same level of carbon dioxide in both the light and dark tube. This occurred because the snail performed cellular respiration‚ and the elodea performed both photosynthesis and cellular respiration. In the light‚ the solution was a yellow green‚ and in the dark‚ the solution was a yellow green. From this experiment
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between crayfish and elodea. In order to figure this out we first set up three beakers to represent our control‚ elodea and crayfish and filled them with 75mL of culture solution which were dechlorinated making the solution acidic. We then had to place both the elodea and the crayfish in separate beakers filled with 25mL of water. The increase in volume of the water would represent the volume of the two test subjects. We then covered each beaker with plastic‚ but for the elodea we placed it under a
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photosynthesis in a plant called Elodea. Elodea is an easy plant to use for this experiment because it is cheap‚ abundant‚ and easy to take care of. This photosynthetic organism needs to be kept in an aerated freshwater tank. To do this experiment‚ put the Elodea in a beaker of freshwater. Anchor the Elodea using a small weight like a paperclip so that the plant remains in the same position and up right through the entire experiment. Place the beaker of water containing the Elodea in front of a light bulb
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