The Effect of Concentration Gradient on Osmosis Abstract: Osmosis is the passive movement of water from an area of higher concentration to an area of lower concentration‚ usually across a membrane (Thorpe 2013). Tonicity is the ability of a solution surrounding a cell to gain or lose water (Reece 2011). There are many factors that affect the rate of osmosis. These include temperature‚ surface area‚ difference in water potential‚ pressure‚ light and dark and most importantly what we will be talking
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Given that cell A has significantly more nongated K+ channels than cell B‚ which cell has the larger resting membrane potential? Explain. If the permeability to K is higher in A than in B‚ then the resting membrane potential (rmp) will be closer to the equilibrium potential in cell A‚ which means the rmp will be more negative in cell A than in cell B; or in other words‚ the potential difference will be LARGER in cell A. 2. Predict the effect of a reduced extracellular concentration of Na+ on
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B1: The permeability of the cell increases enormously during the action potential. Comte Whitney Electricity is vital for neural function and communication. The semi-permeable membrane and presence of charged particles in solution (ions)‚ enables the cell to have control of an electric potential. The cell The concentrations of Na+ and K+ ions upon either side of a cell’s membrane are not equal. In order for the equilibrium to be restored‚ sodium will attempt to enter the cell‚ whilst potassium will
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which helped us to understand the topics deeply which were untouched before. Any suggestions to improve are always welcomed. To Whom It May Concern: I‚ Dr. S.K. Laroiya‚ hereby authorize the following students‚ to conduct a comparative study on detergents. They are authorized to act on my behalf in all manners relating to conducting of this study. Any and all acts carried out by them on my behalf shall have the same affect as acts of mine. Name of Students: 1. 2. 3. 4. 5. 6. Siddharth Saraswat Saurabh
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Running head: LAUNDRY DETERGENT Laundry Detergent October 9‚ 2011 Jessica L. Kelley Principals of Marketing Bennett Hirsch American Continental University Abstract From my research and what I have learned‚ there are three marketing environment forces that will impact laundry detergent. The paper describes each and analyzes why and how it will impact laundry detergent. It also goes over the strategies to overcome the threats.
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ACTIVITY ONE- Cell Transport Mechanisms and Permeability: Simulating Dialysis (Simple Diffusion) 1. Describe two variables that affect the rate of diffusion. Molecular weight affects the rate of diffusion because the bigger the size of the molecule the longer it will take to diffuse. Membrane size is another variable that affects the rate of diffusion because if the membrane’s pores are small it will take molecules longer to diffuse though it than if the pores were larger. Also‚ membrane thickness
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conclusion is that the higher salt concentration in the solution the greater the decrease in mass of the potato will be‚ the graph I have drawn supports my conclusion. The 10% salt concentration shows that on average the potato loses 2.6% of its overall mass. 20% salt concentration shows a further decrease in mass this time it is an average of 13% overall mass decrease. 30% salt concentration shows an average decrease of 18.8% in overall mass. The 0% salt concentration actually shows a mass increase
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Question 1: You have carried out an investigation into the pigments that make up chlorophyll. Use the chromatogram you obtained when carrying out this investigation. Clearly explain the separation technique of paper chromatography in terms of partition. Calculate the Rf value of one of the constituent pigments and compare it to the book value. A paper chromatography was used to separate the pigments that make up chlorophyll to analyse‚ identify‚ and quantify the components‚ using paper (stationary
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Outline the roles of membrane at the surface of the cell The plasma membrane encloses the cell‚ defines it boundaries and maintains the essential differences between the cytosol and the extra-cellular environment. The separation of the internal and external environment maintains a constant internal environment which is essential for the cell to function efficiently. Membrane receptors can interact with specific molecules corresponding to stimuli such as hormones to generate a signal cascade which
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Introduction I am going to try and measure the rate of respiration in yeast and find out what factors affect the rate of respiration. I am going to change the concentration of the glucose solution and I’m going to measure the volume of gas produced during respiration in cm³. Yeast contains enzymes. Enzymes speed up a chemical reaction – they’re biological catalysts. Yeast can respire both aerobically and anaerobic; the anaerobic respiration of yeast is known as fermentation. The equation for
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