More handpicked essays just for you.
Principles behind osmosis and diffusion
The aim of investigating osmosis
Principles behind osmosis and diffusion
Don’t take our word for it - see why 10 million students trust us with their essay needs.
Recommended: Principles behind osmosis and diffusion
Osmosis is the process of moving water from a region of high concentration to a region of low concentration. The water and the fluids constantly try to move into or out of the cell through the cell permeable membrane. Therefore, Fluids and water movement among the cells and tissues is depending on the concentration of the solutes and the amount of water in that area. Our body needs a proper balance of water and solutes inside or outside of the cells to be able to maintain the body's cells normal function. When a solution is Hypertonic means that the concentration of solutes are greater outside of the cell compare to inside of the cell, in that situation water move out from the cell and cell will be shrink. Hypotonic solution in contrast, is
This movement causes the glucose-rich region to fill up with water. The water movement is diluting the solution so that the concentration on both sides is equal. Osmosis Figure no.1 This diagram illustrates the net flow of water movement from a hypotonic solution, low solute concentration, to an area of high solute concentration. In other words this shows water movement across the semi permeable membrane from a high concentration of water to a low concentration of water.
In this lab we tested osmosis through a semi permeable membrane using dialysis bags (SCC Science Division, 2014). We also looked at osmosis in living cells of potatoes. When water is moved through a semi permeable membrane that is called osmosis. Passive transport is when molecules move with the concentration gradient across the membrane with no cellular energy used. Osmosis and diffusion are examples of passive transport. There is also active transport which is when molecules move against the concentration gradient and uses energy in the form of ATP (Urry, Cain, Wasserman, Minorsky, Jackson, & Reece, 2014). There are three types of conditions that deal with osmosis that will be found in this experiment: isotonic, hypertonic, and hypotonic solutions. Isotonic is when the concentration of a solute is identical outside of the cell and inside of the cell. Hypertonic is when the concentration of solute is higher outside of the cell than inside of the cell. Hypotonic is when the concentration of a solute is less than the solutions outside the c...
As said in the last paragraph osmosis is the movement of water across the membrane. Well osmosis breaks down into 3 groups itself. Isotonic, is where the concentration
(1) Isotonic dehydration happens when there is a proportionate loss of water and electrolytes. Therefore, the electrolytes and water loss are in the similar amount or concentration in both intravascular and extravascular compartment. (2) Hypotonic dehydration happens when electrolytes losses are more than waster loss. Due to the low serum electrolyte concentration, intravascular water shifts to extravascular compartment and intensify the intravascular volume depletion. (3) Hypertonic dehydration happens when water loss is greater than electrolyte loss. Due to the high serum electrolyte concentration, extravascular water shifts to intravascular compartment and decreases the intravascular volume depletion. On the other hand, water is pulled from the cells to extracellular space via osmosis. In order to maintain the fluid volume inside the cells, the cells produce active particles to generate osmotic force to pull the water back. If rapidly rehydration is given, it induces large influx of want into the cells and causes cellular swelling and rupture such as cerebral
Most cell membranes are like that, being permeable to water and some solutes only. Osmosis is therefore the diffusion of water through a partially permeable membrane. The basic principles of diffusion apply here.
Osmosis is the net movement of water molecules from a region where there is a higher concentration of water molecules to the region where there is lower concentration of water molecules. The water molecues move through a partially permeable membrane, which allows the smaller molecules to pass but not the big ones. The diffusion of molecules from the region of higher concentration to the region of lower concentration until the concentration of water molecules has become same in both the areas.
Abstract In the Biology Laboratory session, I worked with two partners on Osmosis. It means the diffusion of water across a selectively permeable membrane, which is the plasma membrane in a biological system. The purpose of this activity is to find the weight of potato cores in two separate beakers. One beaker contains distilled water and the other one is 10% NaCl.
The experiment was centered on the question: What is the concentration of sugar in a potato? This question is an important one to understanding how we digest potatoes and could be used for nutritional information. In order to find the answer to this question we cut a potato into 5 pieces, placing each in a different solution of sugar and water of about 150ml. Then we waited 30 minutes to see if the effects were hypotonic or hypertonic, giving us a reasonable percentage to how much sugar a potato has naturally. We predicted that the solutions with 0%, 1% and 5% sugar would create a hypotonic environment, increasing the weight of the potato pieces. While the 10% and 15% solutions would create a hypertonic environment, causing the potato to lose weight. This assumes that a potato is naturally between 5% and 10% sugar.
The ability of an extracellular solution to make water move into or out of a cell by osmosis is known as its tonicity (KHANACADEMY). A solution's tonicity is related to its osmolarlity, which is the total concentration of all solutes in the solution. Three terms are used to compare the osmolarity of a cell to the osmolarity of the extracellular fluid around it (KHANACADEMY). These terms are also used to describe the solute concentration of solutions relative to each other (Neo). These terms are known as hypertonic, hypotonic, and isotonic soluitions
== == == == Osmosis is defined as the net movement of water molecules from a region in which they are highly concentrated to a region in which they are less concentrated.
Intro The main objective of this experiment is to observe how changing a cell’s environment will affect its mass, which is essentially the principle of homeostasis. Homeostasis means maintaining a balance between an organism, or cell, and its environment. This is shown in this lab because we’ve changed the outside solution that the egg sits in by exposing the eggs to different solutions with different amounts of sucrose solute. By altering each egg’s environment differently, we can expect the eggs in different solutions to change in different ways.
Plan On Osmosis Experiment Introduction Knowing that osmosis (a diffusion of water) will occur across a semi-permeable membrane whenever there is a difference between the water concentration on the two sides of the membrane. And knowing that when this happens to all they will either become turgid if water flows into them, or plasmolysed if the water flows out of them, and therefore change their volume, we are going to test the hypothesis that: "If the concentration of a solution into which a cylinder of potato cylinders are placed is greater than a certain level the cylinder will contract, and if the concentration is less than that it will expand. " Aim 1. To investigate the effect of increasing the concentration of sucrose solution on the rate of osmosis in potato cells. 2.
Every living organism’s salt content is controlled by osmosis. Through osmosis, water moves across an organism’s surface and/or membrane. Osmosis usually moves from high concentration to low concentration. In this experiment we decided to add 300mL of water in 2 jars labeled a Jar A was filled with freshwater while Jar B was created into a saltwater solution. After we added a 1 piece of each of our vegetables which were (carrot, celery and raisin). After we added the vegetables we added cling wrap to each of our jars so the water doesn't evaporate and turn into water vapor. In groups we had to figure out what happens to the vegetables before and after 24 hours in the saltwater, and the freshwater. Vegetables such as carrots
The process of osmosis has a few limiting factors. Osmosis can only occur through a semipermeable membrane, meaning there are proteins on the phospholipid bilayer that regulate what can come in and out of the cell. It also takes longer for the two sides to become equal if the solvent particles are bigger on one side, and if the particles are less crowded. If the particles are bigger, it is harder to get them through the membrane. If the two sides are almost at an equal state of water and solute concentration, it will take longer for the water to diffuse to the other side of the
Fehling’s solution to test the presence of glucose. The following figure (Figure 6) shows this experiment set up.