UMUC Biology 102/103 Lab 3: Cell Structure and Function INSTRUCTIONS: On your own and without assistance‚ complete this Lab 3 Answer Form electronically and submit it via the Assignments Folder by the date listed on your Course Schedule (under Syllabus). To conduct your laboratory exercises‚ use the Laboratory Manual that is available in the WebTycho classroom (Reserved Reading or provided by your instructor) or at the eScience Labs Student Portal. Laboratory exercises on your CD may not be
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Osmosis in Potato Cells Interpretation My results show what I predicted would happen. My prediction was that as the concentration of sucrose increased the amount of water moving in or out of the potato would change. A low concentration of sucrose solution would make the potato increase in length and mass (become turgid). A high concentration of sucrose solution would make the potato shrink (plasmolysed) We can see this occurred‚ as at 0.1mol of sucrose solution the potato’s size increased by an
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“Is Starch Permeable in Cells? Abstract This report presents the weights of 3 samples of water with various amounts of solute after the use of osmosis. Three different tests were performed‚ each with a beaker of water containing varying amounts of starch from 30% concentration (12.5 grams of water) to 15% concentration (9.5 grams of water)‚ and then 0% (10.5 grams of water). To start this experiment‚ we put water into a make-shift dialysis tube‚ a type of semi-permeable membrane tubing made
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osmolality and the term tonicity referrers to the osmolality of a solution. The cells in the body are exposed to three different solutions classified as isotonic‚ hypotonic‚ and hypertonic. Isotonic solutions have the same osmolality as body fluids. They do not change the size or shape of the cells‚ leaving them in a balanced state. Examples of isotonic fluids include 0.9% saline‚ Lactated Ringers (LR)‚ D5W‚ 0.225% saline‚ D5/0.225%‚ Whole Blood‚ and Packed Red Blood Cells. 5% Dextrose‚ Normal Saline
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performing this experiment‚ the main element to consider is hypertonic‚ hypotonic and isotonic solutions and how they relate to osmosis. Osmosis is the process where a fluid passes through a semipermeable membrane‚ which moves from an area which the solute is present in high concentrations. As a result of osmosis‚ there will be an equal amount of fluid on either side of the barrier‚ creating an isotonic solution. When cells are placed in an isotonic solution‚ the movement of water outside of the cell
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Tube 1) Distilled water: This bag will lose water. b. Tube 2) .2M sucrose solution: This bag will lose water. c. Tube 3) .4M sucrose solution: This bag is isotonic to the beaker and will remain the same in mass. d. Tube 4) .6 M sucrose solution: This bag will gain water e. Tube 5) .8 M sucrose solution: This bag will gain water. f. Tube 6) 1.0 M sucrose solution: This bag will gain water. 10. A
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The decalcified eggs will be weighed before and after being put in the solutions. The zero and ten percent solutions are hypotonic‚ so the eggs should gain weight. The twenty percent solution is isotonic and the weight should primarily stay the same. The forty percent solution is hypertonic‚ so the weight should decrease. (Muller) Experimental Procedure Eight eggs are placed in a medium glass bowl and covered in vinegar. (Although‚ we only need four
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Water molecules move from high to low Osmosis is what they seem to know Solute and Solvent are what’s inside The polarity of water makes it easy to find “Hyper” and “Hypo” tells you how much is there But isotonic means that they are fair Water molecules move from the inside out Scientists call this plasmolysis without a doubt All of this happens inside a membrane It is a serious matter‚ not a fun little game When a membrane is selective it chooses what it wants Few things are moved through
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increasing the concentration of the ECF. Hypothesis This is the hypotheses that you developed before conducting your experiment. It is hypothesised that when sheep’s RBC are added to a hypertonic solution‚ they will shrivel and occupy less space within a haematocrit tube‚ when compared to a hypotonic solution that will cause the cells to lyse. Materials and methods This is the description you gave of the materials and methods you used to test your hypothesis. We started by using a weighing
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types of tonicity that one solution can have relative to another. Those are hypertonic‚ hypotonic‚ and isotonic. Hypertonic solutions(more dissolved solute)-the solution with a higher concentration of a solute. Water leaves the cell and the cell shrinks. Hypotonoic solution(less dissolved solute)-the solution with the lower solute concentration. Water molecules enter the cell and the cell becomes larger. Isotonic solution(same amount of dissolved solute)-the solution of equal solute concentration
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