Gummy Bear Lab Experiment

Students have grouped together in their Anatomy Lab using three different types of Sucrose Bathing Solutions and three different deshelled chicken eggs. Students will learn the permeability of the cell membrane by studying the ability of a shell-less chicken egg to absorb the various sucrose bathing solutions. Students can see how membranes can regulate a cell’s interaction with its environment. The deshelled egg is semi-permeable, meaning that some molecules easily move across the cell membrane, some cannot. A cell membrane can transport materials through two general forms: Simple diffusion and Facilitated diffusion. Principles of Medical Physiology states “Facilitated diffusion, it is generally much faster than simple diffusion. Glucose and other large uncharged hydrophilic molecules have extremely slow rates of simple diffusion across the lipid bilayer but they cross the membrane much faster through facilitated diffusion.” Osmosis can be defined as the

Gummy Bears, cup, paper towels, triple beam balance, water, wax paper, metric ruler, calculator, and pencil.

Osmosis is a natural occurrence constantly happening within the cells of all living things. For osmosis to occur, water molecules must move across a semipermeable membrane from an area of low concentration to an are of high concentration. In order to understand osmosis, people must understand the different types of concentrations that can be present within solution. One of them is an Isotonic solution where the concentration of dissolved particles is equal to that of a cell’s. Another is a hypertonic solution where there is a higher concentration of dissolved particles then inside the cell. And lastly there is a hypotonic solution where there are less dissolved particles than inside the cell. As dissolved particles move to a region of lower concentration, water moves the opposite direction as a result of there being less water in the highly concentrated region. In this experiment, gummy bears were placed in salt water, sugar water, and tap water to find the measure of osmosis between the solution and gummy bear.

Repeated Trials: In procedure one, we tested diffusion on different sized cell models (gelatin with various volume and surface area wise). In procedure two, we tested cell models in different internal environments and similar external environments to find the effects on rate of osmosis. In procedure three, we used potato cells in different concentrated sucrose environments to test the effects on water potential on cells and osmosis.

After completing this experiment, our tap water hypothesis was correct, and our saltwater hypothesis was also proven. For the tap water, the gummy bear expanded as we thought it would. This was because of osmosis. The water outside of the bear diffused into the bear from the higher concentration outside into the lower concentration inside of it. The gummy bear was a selectively permeable membrane. This made a hypotonic solution, and the water rushed into the bear, making it get bigger. For the salt water, the bear shrunk as we predicted, also because of osmosis. This was a hypertonic solution, so the water rushed out of the bear, making it smaller. So our hypothesis for both tap and salt water were correct. We carried out the experiment properly

Energy is a concept.� Most definitions of the word energy fail to provide its exact meaning when applied to scientific matters.� In science the word energy is a concept that expresses two measurable properties, heat and work.� Here is the relationship of energy, heat and work:

Osmosis is a special type of diffusion. It is the diffusion of water molecules across a semipermeable membrane (a membrane that allows for the diffusion of certain solutes and water) from an area of higher water concentration to one of lower water concentration. For example, if a 1 M aqueous starch solution is separated from a .5 M aqueous starch solution by a semi-permeable membrane, then water molecules will move from the .5 M aqueous starch solution (higher water molecule concentration) toward the more concentrated 1M starch solution (lower water molecule concentration) until an equilibrium of water molecules exists between the two solutions. Since the semi-permeable membrane did not allow for the passage of starch molecules, the 1M-starch solution will gain in volume as the water moves in (Figure 3).

Over the span of five days, the gummy bears were placed in different types of water. Osmosis is the movement of water molecules from an area that has a higher concentration to a lower area of concentration over a semi-permeable surface. In this case, the gummy bears can be regarded as

Diffusion, the spontaneous movement of molecule from an area of higher concentration to an area of lower concentration, and

When the different gummy candies are placed in water for 24 hours, the size and appearance changes due to osmosis. The mass, volume, and length of the three different gummy candies were measured before and after the experiment, and the changes shown after the experiment were significant. Out of the three gummy candies used in the experiment, the gummy bears showed the least amount change in mass, volume, length, and in average changes. The gummy fruit had the most consistent results out of the candies. The results gathered showed that the gummy fruit had changes that were in the decimals, such as in the average change.

The Effect of Tonicity and Osmosis on Gummy Bears Introduction Gummy bears work the same as a cell’s plasma membrane because they allow the movement of water molecules in and out of the gummy bear. The plasma membrane is known as selectively permeable because it allows movement of certain molecules and blocks the movement of others. Active transport is an example of a movement that requires a carrier protein and the use of energy to move against the concentration gradient. Passive transport is simply the movement of molecules without the use of energy.

Diffusion is the movement of molecules from a region of higher concentration to a region of lower concentration. The rate at which molecules diffuse can be determined by the relationship of molecular weight and that rate of diffusion through a membrane. Hypothesis of this experiment is that the fluid with higher molecular weight will diffuse at a slower rate and distance.

Diffusion is the transfer of molecules from an area that has a higher concentration to an area that has a lower concentration. Osmosis is the diffusion of water. The purpose of this experiment was to study the process of osmosis. In order to test osmosis, eggs that had been soaking in vinegar were taken and placed in four beakers of solution with different levels of glucose. Using this experiment we were able to determine the rate of osmosis of different solutions, with various amounts of glucose, through eggs. In the results of this lab it was found that the eggs were either hypertonic or hypotonic and that the

When a vacuole is filling with water, it will make the plant cell rigid and hard. I learned that even if the plant cell is not in the ground it can still become turgid or flaccid. I learned how to use a squeezer to put vanilla in a balloon. When I put the vanilla in the balloon, I did not accept the smell to leak outside of the bag. After an hour I was surprised that the bag smelled like vanilla. I learned the smell was in the bag because it used passive transport to get through the balloon. Passive transport is when something is transported without using energy. The smell wanted to leave and get to the outside of the balloon. When I left the bag open for two minutes, the smell was not concentrated. I learned that the smell then transported to the outside of the bag using passive transport. I learned the difference between diffusion and osmosis. Diffusion is the movement of molecules from an area of high concentration to an area of low concentration. Osmosis is the diffusion of water across a cell membrane. In conclusion, I learned that science can show you how many things work and how you can be surprised of what you

There’s not much that comes to mind when it’s time for that first cup of coffee in the morning except hoping that it’s strong enough to stimulate the mind for the time being. This real life scenario is an example of diffusion. Simple right? When cream is poured into coffee it remains heavily concentrated in the area it was poured at and eventually spreads throughout it. The more the coffee is stirred the quicker the cream spreads even more. Sugar would do the same thing as well. This is an example of how the interstitial fluids work within the bodies of humans. Interstitial fluids that enclose in on a cell would be the cell membrane or the plasma membrane’s doing. It creates a barrier between the internal fluids and the exterior environment. When the body moves, the diffusing of the molecules within it accelerates. The plasma membrane is made up of many substances, like salts, vitamins, nutrients, waste products, etc… The plasma membrane dictates what enters and makes sure it’s sufficient. It blocks out the other substances that isn’t needed. Also it happens to be selectively permeable. This means either the molecules progress on without a hassle or there may be a little difficulty to progress on. Materials traverse through the membrane by two methods, which are called passive process and active process. In this lab passive process is part of the main focus. Energy from the cell isn’t a necessity when it comes to passive process. The word diffuse