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Diffusion is vital to many life functions of a cell, it allow the transportation of vitally important nutrients and compounds without the expenditure of excess metabolic energy. To explain diffusion, it is as if a bottle of perfume is opened at one end of the room, then in a short amount of time a person at the other end of the room can detect the scent of the perfume; this is the process of diffusion.
Diffusion is a movement from a higher concentration to a lower concentration. A special kind of diffusion is known as osmosis, osmosis is fundamental in many industrial processes such a water purification, desalination, and waste material treatment.
Osmosis is when water is separated by a selectively permeable membrane, with different solute concentrations on either side of the membrane. In osmosis water is moved from regions of low concentration to regions of high solute concentration.
Osmosis also has a major impact on living cells. When the two solutions on either sides of the membrane are equal and no net movement is detected, the solutions are isotonic. This means that the solutions have the same concentration of solutes. If two solutions differ in the concentration of solutes that each has, the one with more solute is hypertonic.
The solution that has less solute is hypotonic. Water potential determines the direction and rate of osmosis. Water potential consists of pressure potential, which is the exertion of pressure on a solution, and osmotic potential, which is the relative concentration of solutes within the two solutions.
Diffusion and osmosis occur between different molar solutions until the solutions are isotonic, effecting the pressure of the plant cells. In this experiment my group used the following materials: Then we obtained a piece of dialysis tubing that has been soaking in water, and we tied a knot in one end of the tubing.
Then recorded the color of the solution in the bag and noted it in Table 1 in the Analysis section. After, we then determined if glucose was present in the tubing by dipping one of the glucose indicator strips into the solution and then recorded the data in Table 1.
Afterward we then carefully tied a knot at the open end of the bag, but left enough space in the bag for expansion. After that we determined if glucose was present by dipping another glucose strip into the solution in the beaker and recorded the data in Table 1.
Then we immersed the dialysis bag completely in the solution and waited 30 minutes. Then we removed the dialysis bag from the cup and recorded the final color of the solutions in the bag and the cup in Table 1.
Using glucose indicator strips we then determined the glucose content in both the beaker and the dialysis bag. Finally we recorded the presence of absence of glucose in Table 1. My group obtained six plastic cups and labeled them as follows: Then we obtained six pieces of dialysis tubing from the beaker of water and tied a knot in one end of the tubing.
Afteer, we opened one piece of dialysis and poured 25 ml of distilled water into the tubing and then tied of the other end securely leaving room for expansion.
Then we repeated the same process witht eh remaining five pieces of dialysis tubing, adding a different sucrose solution to each bag: Then filled the six plastic cups approximately? After waiting 30 minutes, we removed the bags from the cups, dried them and weighed each bag once again recording the final mass of each bag in Table 2.
Ap Bio Osmosis & Diffusion Lab Essay. Stacy Hernandez Period 1 Mrs - Ap Bio Osmosis & Diffusion Lab Essay introduction. Riley AP Biology Osmosis and Diffusion Lab I. Introduction: Diffusion is vital to many life functions of a cell, it allow the transportation of vitally important nutrients and compounds without the expenditure of excess metabolic energy. We will write a custom essay sample on Ap biology osmosis specifically for you for only $ $/page. Order now Change the objective lens for a higher magnification on your sample (solo, ex., igloo) as to make out things such as Its nucleus. Ap Biology Egg Osmosis Lab Essay Words | 3 Pages AP Biology August 23, Egg Osmosis Lab Definition of osmosis: The diffusion of water across a selectively permeable membrane from high to low concentrations Hypothesis: If I place an egg in vinegar, then the outer layer of the egg is going to become slimy and look like rubber.
Part C, Water potential: Then we poured ml of one olution we were assigned into a plastic cup and took the initial temperature and recorded it in Table 3. Then we inserted four potato cylinders and cover the cup and let it stand overnight.Osmosis Rates in Artificial Cells Daniel George Department of Biology Grand Valley State University 1 Campus Drive Allendale, MI [email protected] Abstract The lab for this paper was conducted for the topic of osmosis, the movement of water from high to low concentration.
Osmosis Potato Lab Report Biology 4u Essay Words | 9 Pages Introduction The movement of water molecules across a semi-permeable membrane is the process of osmosis. Diffusion and osmosis prelab ap biology essays.
November 18, Diffusion and osmosis prelab ap biology essays.
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0. Henry viii good or bad king essay whole cell recording analysis essay gbessay sesay churay essay about birth order susan krauss gay marriage essay papers college. Osmosis Rates in Artificial Cells Daniel George Department of Biology Grand Valley State University 1 Campus Drive Allendale, MI [email protected] Abstract The lab for this paper was conducted for the topic of osmosis, the movement of water from high to low concentration.
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