Page 3: Introduction Pages 4 – 7: Preliminary Experiment Pages 8 - 14: Main Experiment Introduction In this experiment I am going to investigate the effect of varying concentration of a differing glucose solution on the amount of osmotic activity‚ between the solution and a potato tuber of a given size. The purpose of this experiment is to demonstrate how living cells rely on osmosis‚ the diffusion of water. Osmosis is
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Process of Diffusion and its importance in living organisms Diffusion is the movement of molecules or ions down a concentration gradient i.e. from an area of high concentration to an area of low concentration. For a diffusion system to be efficient‚ it should have a large surface area so that high amount of substances can be exchanged at a time. It should also have a thin membrane and a continuous supply of substances‚ as a thin membrane means that the diffusion pathway would be short‚ and the continuous
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Cell Transport Mechanisms and Permeability: Activity 1: Simulating Dialysis (Simple Diffusion) Lab Report Pre-lab Quiz Results You scored 100% by answering 4 out of 4 questions correctly. 1. The driving force for diffusion is You correctly answered: b. the kinetic energy of the molecules in motion. 2. In diffusion‚ molecules move You correctly answered: a. from high concentration to low concentration. 3. Which of the following dialysis membranes has the largest pore size? You correctly answered:
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3-Day Exercise Activity Analysis Starting an exercise plan is easy the problem will be sticking to it. My current exercise habits are walking for about 30 minutes at least three times a week and playing Michael Jackson’s The Experience on the Wii. These exercises allow incorporate aerobics and stretching into my exercise. I stretch before I begin to workout‚ the Wii and walking routine gets my heart rate going. During my workouts I use a waist trimmer. I zip it up around my abdominal area and
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Introduction This experiment was osmosis and diffusion. In this experiment I began by calculating the volume of a fresh chicken egg. Then to determine the effect of osmotic pressure change on a cell I soaked the raw chicken egg in vinegar for 24 hrs‚ and measured the volume of the egg after the shell had been dissolved by the vinegar. The egg was then submerged in corn syrup for 1-24 hrs‚ then measured and recorded the new egg volume. Finally the egg was submerged in water for 1-24hrs‚ again the
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These articles were very interesting and different from most of the academic articles that I have read. The second article “Increasing Physical Activity Through Recess” was unique and made me think a lot about my own personal experiences. I found that most of the ideas were very innovative. The one concept that I found I think would have the greatest positive impact on the students was talking about “training recess supervisors to teach new games.” This idea seems like it would be so much fun for
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Membrane Behavior Lab Abstract: Introduction: The permeability of a cell to solutes in an aqueous medium depends upon the physical and chemical make–up of the membrane. The maintenance of the living cell depends upon the continued presence and functioning of a selectively permeable membrane. If the nature of the membrane is changed or altered in any way‚ this may well affect its permeability and thus the properties of the cell of which it is a part. Irreversible changes in the permeability
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Cell Membrane and Organelle Webquest Name Yamani Woody Using the websites listed‚ answer the following questions. Website #1: http://www.usd.edu/~bgoodman/Membrane.htm http://www.biologymad.com/cells/cellmembrane.htm 1. What invention came along that enabled us to better see the cell membrane? Electron Microscope 2. What are the two parts (list the first two listed) of the cell membrane? Phospholipids and proteins 3. What is one of the cell membrane’s jobs? It controls how substances can
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with transient flora. In this procedure‚ one would add an antiseptic agent to the detergent. You use an antiseptic solution to clean your hands‚ either with medicated soap or alcohol. In the section Hand Hygiene Agents What agent has excellent activity and the most rapid bactericidal action of all antiseptics? Alcohol-based preparations Which alcohol is the most effective? N-propanol Which alcohol is the least effective/? ethanol After extensive reduction following hand disinfection with
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was fifth grade when I learned that my father has been diagnosed with cancer and the tedious trips to the hospital began. With each passing month and hospital trip I unknowingly learned lessons about life that I would not understand until later. Observing my father battle cancer has taught me many life lessons that can only be learned from first hand experience and the impact he made on my life by doing so has shaped me today.
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