Artificial Cell Diffusion Lab Report

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Analysis: Part one Diffusion through a dialysis membrane in an artificial (model) cell: We can show diffusion or osmosis by making an arifical cell using a bag made of dialysis tubing and placing it in a beaker of water. The bag represents a cell; the dialysis tubing represents the cell membrane. Inside the bag or your artificial cell, is your glucose, and starch. Outside the artificial cell is only water. Glucose is a small molecule and will diffuse out of the bag into the water in the beaker. Starch is a large molecule and will not diffuse out of the bag into the water. If there is more concentration of a dissolved substance on the outer surface of the cell and a lower concentration of dissolved substance in the interior of the…show more content…
The quantity of a substance in a particular are is called concentration. Molecules go from an area of higher concentration across a membrane to an area of lower concentration. Substances diffuse from areas of high concentration to low concentration. Diffusion continues until the molecules are evenly disseminated, their concentration is equivalent throughout the region that contains…show more content…
When water goes from higher concentration of water across a membrane to a lower concentration of water is called osmosis. Diffusion and osmosis (diffusion of water) are called passive transport because no energy is required for diffusion. Diffusion does not involve any form of energy input. The movement of a solute from a region of low concentration to a region of high concentration needs and requires energy contribution in the form of ATP and protein carriers called pumps. Some cells can use cellular energy to force materials to go across a membrane from areas of lower concentration to areas of higher concentration. This is the opposite of diffusion; diffusion is from higher concentration to lower concentration. Since energy is required it is called active transport. Water travels in the course of membranes by diffusion; this process is called osmosis. Like solutes, water travels down its concentration incline. Water travels from areas of high water concentration and low solute concentration to areas of low water concentration and high solute concentration. In cells, osmosis is pretentious not only by the solute concentration but as well as the confrontation to water movement in the cell by the cell wall. This resistance is called turgor

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