REVIEW SHEET Lab Report – Lab 3 Addendum – Cell Anatomy and Physioligy PhysioEx Worksheet Mark R. Graham 1455 Betty Court‚ Orange Park FL 32073 BSC2085C - Anatomy and Physiology I - 333738 Fall Term 2010 Larry Chad Winter lwinter@fscj.edu Submitted - 9/18/2010 NAME Mark Graham Cell Transport Mechanisms and Permeability Activity 1: Simulating Dialysis (Simple Diffusion) Chart 1 – Dialysis Results |Membrane (MCWO)
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Abstract I found that this experiment gives me an understanding on how osmosis and diffusion works. In its simplicity‚ it explains the process that our bodies (mainly cells) use all the time. It also showed me that even with the temperature changing‚ it doesn’t drastically change the rate of diffusion. Introduction Diffusion is important in all living systems. Osmosis is the passage of water from a region of high water concentration through a semi-permeable membrane to a region of low water
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The purpose of this lab was to observe how molarity concentration affects diffusion.The lab was primarily based on osmosis and diffusion. Diffusion is when the movement of molecules from a high concentration that go to a low concentration to a high concentration to eventually reach an equilibrium. Osmosis is when water will diffuse from high water concentration to low water concentration to reach equilibrium. When the solutions are different the lower concentration solute is hypotonic while the higher
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though the stomates open to release water‚ it also brings in carbon dioxide to produce sugar and oxygen through a process of photosynthesis. The water absorbed by the roots is moved by osmosis‚ root pressure‚ adhesion‚ and cohesion from high to low areas of water potential. From the roots‚ water is transported with osmosis with a pressure pulling the water and minerals up towards the leaves. It is the transpirational pull moving it up with the help of cohesion and adhesion. Transpiration decreases the
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Name: Jenny Rose A. Semaning Date Due: July 6‚ 2012 Co-workers: Adelfa Masculino Date Performed: June 29‚ 2012 Farrah Belle Barredo Experiment 2 The Cell Membrane Abstract The boundary between any cell and its environment is the plasma membrane‚ composed of a matrix of phospholipid molecules along with a number of different kinds of proteins. Membranes have different properties and a variety of functions‚ in large part determined by the specific proteins within the membrane
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life functions F. Homeostasis - The tendency of living organisms to control or regulate changes in their internal environment G. Diffusion - The movement of molecules from an area of high concentration to an area of low concentration H. Osmosis - The diffusion of water across a selectively permeable membrane I. Osmoconformer - An organism that allows its internal concentration of salts to change in order to match the external concentration of salts in the surrounding water J. Osmoregulator
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membrane traffic in lab‚ explain the differences between the solutions hypertonic‚ hypotonic‚ and isotonic and how they respond using the understanding of the cell membrane structure‚ types of transport mechanisms such as active‚ passive‚ diffusion‚ osmosis‚ and explain the movement of particles moving across the cell membrane. In this lab was divided into two parts. The first part was varying the concentration and the second part was varying the temperature. All cells are controlled by a cell membrane
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as in the left‚ would you be able to observe any diffusion? No they would be equal Does being unable to observe diffusion necessarily mean that diffusion is not taking place? No the rate of diffusion may be either very rapid or gradual. 4th : Osmosis Did you observe any pressure changes during this experiment ? if so in which beakers and which membranes? I did not notice any pressure changes. Why? Both of the pressures in the beakers were not equal. Did the Na/Cl diffuse from the left beaker
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solution from another by osmosis. The higher the osmotic pressure of a solution‚ the more water tends to move into it. Pressure must be exerted on the hypertonic side of a selectively permeable membrane to prevent diffusion of water by osmosis from the side containing pure water. Osmotic concentration refers to the measure of solute concentration‚ defined as the number of osmoles of solute per litre of solution. These particles must be osmotically active for the process of osmosis to take place. Keeping
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3 1. The pressure will increase due to the increased concentration of sodium chloride. The pressure increased. 2. Neither one requires ATP. Simple diffusion is the movement of a solute from an area of HIGH to LOW solute concentration but osmosis is the movement of water from an area of LOW to High solute concentration. 3. Because water moves toward the HIGH concentration of solutes. 4. We know the pressure will increase in the albumin beaker because it is more impermeable than glucose
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