Molecular diffusion

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    Glucose Diffusion Lab

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    other and move into different places. Diffusion is the random movement of molecules from an area of higher concentration to an area of lower concentration. Cells have selectively permeable membranes that only allow the movement of certain solutes. Diffusion is vital for many of life’s functions in a cell. It allows oxygen and carbon dioxide exchange in the lungs and between the bodies of intracellular fluid and cells. An example of this process is the diffusion of a smell in a room. Eventually…

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    Diffusion is the process in which molecules blend together because of their kinetic energy (Hyperphysics, n.d.). It is a type of transport located in the cell membrane. Diffusion could also be described as the movement of molecules from areas of high concentration to areas of low concentration. The molecules do this because all molecules are constantly moving, so in enough time the molecules will spread evenly. According to figure 1, the cell will make the outside solution the same…

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    1. What is Diffusion? Give an example of diffusion happening in the human body. Diffusion happens when molecules disperse themselves evenly throughout an enclosed area by colliding with other molecules (Wood, 2013, ex. 6). Because the molecules are not using ATP to move, simple diffusion is considered a passive mechanism of transport. Until the substance is equally distributed across the area it is contained in, it will continue to diffuse (Wood, 2013, ex. 6). Once the substance is equally…

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    Because ATP or other energetic compounds are not directly involved in co-transport, it is referred to as secondary active transport. The electrochemical ion gradient is mainly established by the Na+,K+-ATPase. Facilitated diffusion is an example of passive diffusion, but aided by membrane-spanning channel proteins that span the lipid bilayer. Therefore, the particles (molecules or ions) do not have to dissolve in the cell membrane's hydrophobic lipid bilayer, allowing hydrophilic and larger…

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    Simple Diffusion Lab

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    to enter and exit the cell. Simple diffusion is movement of molecule through the plasma membrane without the help of any channel or proteins. In simple diffusion molecule move down their concentration gradient; as a result, they don’t require energy input. In the computer simulated lab for simple diffusion, nothing will move across the membrane because NaCl, urea, albumin and glucose are all too big to go through the semi-permeable membrane. Facilitated diffusion is movement of particles from…

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    Diffusion is the movement of solutes and is a passive transport where particles move from higher concentration regions to lower. The cell membrane selectively restricts diffusion so ions move across the membrane by crossing the lipids or going through a channel. "Alcohol, fatty acids, and steroids can enter cells easily, because they can diffuse through the lipid portions of the membrane." (Anatomy and Physiology Textbook 86) The rate of diffusion is affected by surface area…

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    concentration is called diffusion. That is where the molecules spread out evenly throughout the area. When you have a difference in the concentration in a distance is called a concentration gradient. Random movement of molecules are called Thermal Molecular Motion. There are two factors that can effect the speed of a thermal molecules motion. The temperature of the solution and its molecular weight. The purpose of this experiment is to observe Brownian movement and it relationship to molecular…

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    students will investigate the process of osmosis and diffusion in a model membrane system and the effect of solute concentration on water potential, the force created by both physical pressure and solute concentration, as it relates to living plant tissues. Diffusion is the passive movement of molecules or particles from a region of high concentration to an area of low concentration. Particularly, osmosis, a special type of diffusion, is the diffusion of a solvent, usually water molecules,…

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    2.03 Lab Permeability

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    and, or, iodine. Also, to find out wither potatoes are hypotonic, hypertonic, or isotonic by testing the different amounts of sucrose solutions Introduction: The necessary background information needed for this lab is the definition of osmosis, diffusion, active transports, passive transports, permeability, concentration, tonicity, and to now the scientific concepts of hypotonic, isotonic, and hypertonic. Hypothesis: For part 1 my hypothesis is: That the starch will diffuse across the…

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    system. There is a constant movement of various molecules in and out of the cell that brings nutrients in and brings waste out. This movement of particles in and out of cells is based around osmosis. It is written in the Lab Manual (2014) “Osmosis is diffusion of water across a differentially permeable membrane” (p. 97). In this experiment, dialysis tubing, a type of differentially permeable membrane which only lets water molecules through, was used to create bags used to model cells. Four bags…

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