Throughout this lab‚ diffusion and osmosis has been seen and tested through experiment. In part A of the lab‚ diffusion was demonstrated with two solids and an agar gel petri dish. One crystal of potassium permanganate and one crystal of methylene blue were placed on either side of an agar gel petri dish. The purpose of this experiment was to determine which of the crystals would diffuse across the gel more. So the question is‚ which solid would have a higher rate of diffusion through the agar‚ methylene
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Simple diffusion and facilitated diffusion both _______. move solutes with their concentration gradient Which of the following would decrease the rate of facilitated diffusion? decreasing the number of carrier proteins What happens to facilitated diffusion when the protein carriers become saturated? The maximum rate of transport will occur. What happened when sodium chloride was added as a solute in the left beaker? There was no change in the transport rate of glucose. Which of the following
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Osmosis Lab Introduction: In order for cells to interact with their environment‚ molecules must be able to move through the cell membrane. Movement within the cell occurs by diffusion. Molecules move through the cell membrane by osmosis. Diffusion is the movement of molecules from a region of higher concentration to a region of lower concentration. This happens because of random molecular motion. Molecules move around randomly until there is an even mixture throughout cell and mixture. The overall
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* Diffusion-is the process whereby particles of liquids‚ gases‚ or solids intermingle as the result of their spontaneous movement caused by thermal agitation and in dissolved substances move from a region of higher to one of lower concentration. The rate of diffusion depends on the size of the surface area to the volume in the cell. The higher the surface area of cells in relation to their volume‚ the quicker diffusion takes place. Experiment on Diffusion Aim: to determine diffusion Materials:
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Adriana Rempson Mrs. Steeger AP Biology-7 10 October 2012 Transpiration in Plants Abstract: Our group wanted to see how transpiration would happen in plants when they were in different environments. The different environments we used were humidity and room environments. We measured transpiration using the whole plant method. Our results showed that the plants in a humid environment had greater transpiration rates than the plants in the room environment. Introduction: Pants absorb and
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Healthy living is many things. It’s not being the skinniest person ever‚ nor is it being fat. It’s eating enough‚ eating proper food and exercise regularly. Of course‚ I think it’s okay to sometimes eat some chips or take a glass of cola‚ but not all time. Encourage to do physical activity is harder to some than it is to others. For some‚ it’s the easiest thing to go to the gym‚ or start jogging‚ while others can’t get themselves started. And I know a lot a people who don’t understand that. If
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In this experiment‚ we worked with potatoes‚ also known as solanum tuberosum (Watkins‚ n.d). Potatoes are starchy crops that provide a lot of energy. For this experiment‚ our hypothesis was: If the pH level of the solution is more basic‚ then the potato membrane will weigh less due to osmosis. Our null hypothesis was: If the pH level of a solution is either acidic or basic‚ then it will have no effect on the weight. The independent variable was the different solutions of different pH values. The
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Week 9 Week 9 Application: Diffusion of Responsibility Pro-Social Behavior Conceptually‚ pro-social behavior includes behavior intended to benefit others‚ including behaviors such as helping‚ comforting‚ sharing‚ cooperating‚ reassuring‚ defending‚ and showing concern (Fiske‚ 2012‚ pg. 342). Pro-social behavior is intended to help another individual or group‚ but not benefit the self. Pro-social behavior reflects four types of social motivation‚ which reflects our core social motives (Fiske
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Unit 4 Lab – Effects of Osmosis on Living Tissue Assignment Total: 35 Points Course Weight: 6 Pre-Lab Preparation - Review the following resources to complete this assignment: Textbook: Chapter 5‚ pg. 83-86 Mastering Biology / Study Area / Chapter 05 – The Working Cell / Student Home Key Concepts Video: Plasmolysis Video: Turgid Elodea Activity: Membrane Structure Activity: Diffusion Activity: Osmosis and Water Balance in Cells Bioflix: Membrane Transport Additional Resources Blast Animation: Diffusion
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Chapter 4 Microscopes Two important factors in microscopy are: 1) Magnification: an increase in the object’s apparent size compared with its actual size. 2) Resolving Power: the ability of an optical instrument to show two objects are separate. Three types of microscopes: 1) Light Microscope (LM) M: 1000x RP 0‚2 micrometer (small bacterial cell) 2) Electron Microscope (EM) uses a beam of electrons to resolve electrons‚ better resolving powers than light microscope M:100‚000x RP 0
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