Dialysis tubing is made from regenerated cellulose or cellophane, and is used in clinical circumstances to ensure that molecule have a filtered flow, and that larger solute molecules do not enter the dialysis tubing (Alberts, 2002). Like a cell membrane, dialysis tubing has a semi-permeable membrane, which allows small molecule to permeate through the membrane. Thus, the dialysis tubing mimics the diffusion and osmosis processes of the cell membrane (Alberts, 2002). Although the dialysis tubing has a semi-permeable membrane, which mimics a cell, its structure is different. The me...
... middle of paper ...
...s a component monomer of starch. As a monomer as opposed to a polymer, it is much smaller and would thus be able to cross the plasma membrane. However, glucose is a larger solute than the component ions of salt, thus meaning that simple diffusion would not be sufficient. Instead, facilitated diffusion would be needed to transport the glucose. However, in the dialysis tubing, there is no facilitated transport like there is for the plasma membrane. Thus, the glucose may pass through the dialysis tubing, but it would not be due to transport, but the artificial enlargement of the passages in the dialysis tubing. Water would move freely inside and outside of the cell, however, because there is a greater solute concentration inside the cell, the water would diffuse through osmosis into the cell model, increasing the final mass of the dialysis tubing and causing cytolysis.
Need Writing Help?
Get feedback on grammar, clarity, concision and logic instantly.Check your paper »
- In life, it is critical to understand what substances can permeate the cell membrane. This is important because the substances that are able to permeate the cell membrane can be necessary for the cell to function. Likewise, it is important to have a semi-permeable membrane in the cell due to the fact that it can help guard against harmful items that want to enter the cell. In addition, it is critical to understand how water moves through the cell through osmosis because if solute concentration is unregulated, net osmosis can occur outside or inside the cell, causing issues such as plasmolysis and cytolysis.... [tags: Osmosis, Dialysis Tubing]
993 words (2.8 pages)
- The purpose of this lab is to determine which molecules can move across a semi-permeable membrane. The hypothesis for this experiment is as follows; As the smaller molecules of iodine travel through the “cell membrane” the artificial cell will gain mass. Dialysis tubing, a thin membrane that behaves in much the same way as a living cell’s actual plasma membrane, was used to test this experiment. After filling the dialysis tubing with the starch and glucose solutions, the artificial cell was then submerged in a water and iodine solution, and the results we’re recorded after 30 minutes.... [tags: Cell membrane, Cell, Semipermeable membrane]
792 words (2.3 pages)
- In this experiment we took dialysis bags and filled them with various sucrose solutions and put them in water over a period of about 90 minutes to look at the osmosis in each bag and the tonicity of each environment the bags were in. We also took potato pieces and submerged them into various sucrose solutions to determine the ideal state of tonicity for plants and the osmosis that occurred over a period of time. The final results for the first exercise was that 0.8M sucrose solution gained the most mass and that it was hypertonic to its environment.... [tags: Osmosis, Semipermeable membrane, Diffusion]
2246 words (6.4 pages)
- Proving that Osmosis and Diffusion Occur in Artificial Membranes by Using a Dialysis Tubing Hypothesis- Osmosis and diffusion will continue until equilibrium is reached and net movement will no longer occur. Solute size and concentration gradient across the selectively permeable membrane will effect diffusion. Materials- please refer to transport across semi-permeable membranes: diffusion and osmosis laboratory exercise hand out. Procedure: please refer to transport across semi-permeable membranes: diffusion and osmosis laboratory exercise hand out.... [tags: Papers]
446 words (1.3 pages)
- Diffusion and Osmosis Across Dialysis Tubing By Jasper Lee, Leo Zhao, Oliva Skopas, Alistair Dobson, and Alex Bell 11/15/13 Purpose: The purpose of this experiment was to demonstrate the principles of diffusion and osmosis, two processes that are essential for life, by using dialysis tubing (a semi-permeable membrane) to simulate the cell membrane and observe said processes. Introduction: Diffusion is the movement of molecules from a higher concentration to a lower concentration. Imagine you had a glass of water and put a drop of food coloring in.... [tags: Dialysis Tubing, Case Study]
1169 words (3.3 pages)
- Dialysis is used when a person’s kidneys have lost 85-95% of their functioning ability. Over 100,000 people in the US are staying alive due to kidney dialysis. Kidney dialysis is also called renal dialysis. There are two types of kidney dialysis: peritoneal and hemodialysis. Both types of dialysis remove waste, salt and extra water, which builds up in the body. Dialysis not only cleanses impurities out of the blood, it also maintains blood pressure and makes sure to keep healthy levels of sodium, bicarbonate and potassium in the body.... [tags: kidney malfunction, peritoneal and hemodialysis]
945 words (2.7 pages)
- Diffusion and Osmosis Shown In Solutions INTRODUCTION This lab, title Diffusion and Osmosis, was centered around the diffusion across a cellular membrane and how exactly materials move and diffuse in concentrations. Both diffusion and osmosis are forms of movement that are part of passive transport dealing with cell membranes. Diffusion is where the solutes move from an area of high concentration to a low concentration. Water goes through the cell membranes by diffusion. Osmosis is specifically the movement of water through membranes.... [tags: Osmosis, Concentration, Cell wall, Cell membrane]
1348 words (3.9 pages)
- Osmosis is a special case of diffusion. It is when the passage of water from a dilute solution moves through a semi-permeable membrane to a more concentrated solution. Selective permeability is whether solutes can cross through a membrane freely or not at all. Plant cells and animal cells differ in that plant cells have a strong cell wall and animal cells do not have cell walls. They both can undergo osmosis and both lose water, however the cell wall of plant cells prevent the cells from bursting whereas animal cells will burst because they have no cell wall.... [tags: Osmosis, Semipermeable membrane, Cell wall]
700 words (2 pages)
- Cells are living things that requires substances to be imported into the cell for growth and repair just as a human, or animal, needs to eat for growth and repair. Unlike the human or animal that has arms, jaws, or external tools to collect and consume food, the basic cell does not have any external appendages to readily obtain the substances it needs. This does not leave the cell without any way to obtain the required substances, obviously otherwise they would all be very short lived, and the ways they obtain substances differ in the required energy and the substance being obtained.... [tags: Cell membrane, Cell, Lipid bilayer]
730 words (2.1 pages)
- Despite the fact that there is still plenty to ascertain about cells, what is known so far has had an extensive impression on a multitude of scientific fields. The analysis of cells has even assisted in the investigation to more effectively understand cancer. Cells are essentially the building blocks of life. As a matter of fact, all organisms varying from the minuscule and simple organisms to the gigantic and sophisticated organisms are made up of cells. Truly, something that is noteworthy about cells is that although they are so small they have even smaller organelles with many important functions within them.... [tags: Cell wall, Cell, Cell membrane, Bacteria]
1577 words (4.5 pages)