Diffusion and Osmosis - Lab Report Example

Extract of sample
Diffusion and Osmosis

The cell and its extracellular environments are fluid in that concentrations of substances dissolved in it vary. Depending on varying concentration of the substances dissolved in water, be it extracellular or intracellular, dissolved substances or water move from one compartment to another directed by physical principles of gradients. To accomplish this, the cell utilizes the processes of osmosis and diffusion as appropriate. These phenomena can be visualized outside the cell by simulating these in vitro. Since cell membrane is a semipermeable membrane and exchanges occur through this, these experiments must utilize a construct of the semipermeable membrane that can be made with a commercially available dialysis tubing and bag. These membranes have microscopic pores through which small molecules like water can pass, but larger molecules, such as sugar cannot pass through them. Thus through this molecular net, solutions of different solute concentrations can be observed to pass in a measurable fashion. This experiment has been designed to prove the hypothesis of the mechanisms of osmosis and diffusion through such a semipermeable membrane.
Diffusion is defined as the movement of molecules from a site of higher concentration to that of a lower concentration. Technically speaking, this difference in concentration creates a concentration gradient, and the steepness of the gradient determines the rate of diffusion. ...
Download paper


For a cell to survive, the exchange of water from outside to cell to inside and vice versa is extremely important since water serves as the medium for transport of metabolic ingredients and byproducts. It can occur mainly through two biophysical processes, osmosis and diffusion…
Author : bkoss
Download 1

Related Essays

Medicine Lab Report
FEV1 or FEV 1 / EVC % ration between males and females....
5 pages (1255 words) Lab Report
Diffusion and Osmosis
One particular example is the absorption of water and other nutrients from the soil by root hairs in plants. The following experiments demonstrate these basic concepts in action, and how distribution of substances in two regions with different concenration gradients occurs....
4 pages (1004 words) Lab Report
Lab Report
Invention of polymerase chain reaction and thermo stable DNA polymerase has revolutionized this concept. Many techniques like Variable tandem repeat (VNTRs) and Short Tandem Repeat(STRs) based Amplified Fragment Length Polymorphism(AFLP) or DNA fingerprinting, Gender ID (Amelogenin), Mitochondrial D-Loop DNA for Maternal identification etc. have been developed for forensic investigations. PM&DQA1 is the first PCR based typing system, developed by the scientist at Cetus Corporation and commercialized by Applied Biosystems. Inc. PM& DQA1 is simple and rapid technique mainly employed in case of...
9 pages (2259 words) Lab Report
Biology Lab Report
Quaternary Disinfectant Cleaner (concentrate), 2007). It may come in concentrated pack indicated as: Pseudomonacidal, Staphylocidal, Salmonellacidal, Bactericidal, Fungicidal, Virucidal, and mildewstatic disinfectant (LYSOL Brand I.C. Quaternary Disinfectant Cleaner (concentrate), 2007). It is also commonly known as decontaminant in almost all spheres where microorganisms are not welcome (LYSOL Brand I.C. Quaternary Disinfectant Cleaner (concentrate), 2007). Its active ingredients are Didecyl dimethyl ammonium chloride, 10.14%, and n-Alykl (C14 50%, C12 40%, C16 10%) dimethyl benzyl ammonium...
3 pages (753 words) Essay
Corporate Governance Lab Report
Capital flow seems directed towards the companies, which practice fair and transparent ways of governing their organisations. With the changing global business scenario the need of understanding and effective practise of fair and technologically advance corporate governance has also increased....
13 pages (3263 words) Lab Report
Water can pass through the membrane, either going inside the cell or going outside of it....
4 pages (1004 words) Essay
Diffusion and osmosis
The solution subjected to the highest temperature demonstrated the fastest rate of diffusion. The effect of varying solute concentrations was demonstrated by adding 2 drops of blood to six test tubes each containing different solutes. Crenation was observed in cells put in hypertonic solution, while lyses were observed in cells put in hypotonic solution. Cells put in isotonic solution showed no change in morphology. The effect of detergent was determined by adding 3 drops of detergent on the sodium chloride solution. The packed cell volume was also determined with the use of the...
6 pages (1506 words) Essay
Got a tricky question? Receive an answer from students like you! Try us!