Resting membrane potentials Definition: Large nerve fibers when not transmitting nerve signals is about 90 millivolt. That is‚ the potential inside the fiber is 90 millivolts more negative than the potential in the extracellular fluid on the outside of the fiber. The Na+-k+ pump also causes large concentration gradients for sodium and potassium across the resting nerve membrane. These gradients are the following: Sodium ( outside): 142 mEq/L Sodium ( inside): 14 mEq/L Potassium ( outside):
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affect the beetroot cell membrane‚ I will keep the temperature constant throughout the experiment by using a water bath and measuring the desired temperature using a thermometer. PH: I will make sure that the pH is stable (constant) and only the temperature varies this is to be done by using buffer in every test tube so as to maintain pH balance for each beetroot sample and insure that pH does not become a variable. PH is important for maintaining the integrity of the cell membrane as integral proteins
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Implementation My aim for this experiment was to find the effect of temperature on the membrane permeability of beetroot. Since I was unfamiliar with this experiment‚ I first conducted a preliminary test. I considered my preliminary test as my trial for this experiment. My Hypothesis for this experiment was to found out the amount of pigment loss of beetroot when exposed to varying temperatures. Betalain pigment found in beetroot My method for this experiment is:- * Use a cork borer to cut about
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Porter’s 5 Forces for Li Ning | Li Ning | | | H for high force‚ L for low force | Match | Intensity of Competitive Rivalry | Number of competitors | H | 1 | | Industry growth rate | H | 0 | | Fixed costs (generally low in IT) | H | 1 | | Storage costs (generally low in IT) | H | 1 | | Product differentiation | H | 0 | | Switching costs | l | 1 | | Exit barriers | H | 1 | | Strategic stakes | H |
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{Every cloud has a silver lining} Life is full of challenges and the longer we live the more we face new events. Some pass easily and others not. Therefore people are divided into groups: one works hard and exerts great efforts and the other one gives up rapidly. The world we live in is not perfect‚ and we will never ever find a world such as the perfect state which the philosopher Plato talked about. Every day there will be things that make us cry or feel sad about ourselves. People who
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movement of water molecule or solvent from a high concentration to a low concentration‚ through selective permeability‚ a protective barrier that provide some particle the ’direct ’ passage in and out of the plasma membrane ( Lacerda L.2011) Allowing some molecules enter and exit the cell membrane‚ to create a balance in concentration inside and outside of the cell‚ by doing so the cell often become hypotonic‚ where the concentration outside the cell is higher than the concentration inside the cell‚ therefore
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Ligia Ramos 11th Grade HL Biology – Ms. Bartels Due Monday October 21st Limitations on Cell Size Research Question: What is the correlation between surface-to-volume ration and ion exchange and how does this relate to cells? Evaluation of Method and Results: Errors/ Limitations: | Suggestions for improvement: | Impact on Results: | Precision - Human error –cutting cubes freely‚ resulting in very different sized cubes‚ especially for the 1cm x 1cm x 1 cm cubes. All the cubes also had slightly
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The topic of our second presentation is about the proverb ‘Every Cloud has a silver lining’. This proverb means in every bad situation there a positive aspect on it. It is also an encouragement to a person who faced some difficulties in life and is unable to see any positive way out. In other words‚ there is always a positive aspect of something no matte how bad‚ difficult or painful the situation may seem. How can these proverb be related with the cross cultural differences is when people especially
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Review 1: The Chemistry and Molecules of Life Please note that this is a general outline of some of the topics we will have discussed and are detailed in chapters 2-5 of your textbook. While this gives you an idea of some of the terms/phrases you are responsible for‚ not all the material we covered is included. You are responsible for everything discussed in class‚ but NOT for material in the book that was not addressed in lecture. Please do NOT assume that if you know the concepts/answers to the
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Silver Linings Playbook directed by David O. Russell is based on Pat Solitano‚ a former teacher who was diagnosed with Bipolar 1 Disorder after walking in on his wife cheating with the history teacher from the school they teach at. This paper will compare how the movie portrays Bipolar 1 Disorder‚ and distinguish the differences between the two by using the DSM-V as a resource. In addition‚ the DSM-V made changes to facilitate diagnosing Bipolar 1 and 2 earlier‚ instead of misdiagnosing for another
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