The following experiment was conducted to investigate the effect of concentration on a potato core. The experiment was done see whether or not the concentration in the NaCl solution would effect the mass of a piece of potato core, the experiment briefly showed that each concentration of NaCl decreased the mass of the piece of potato.
Osmosis and diffusion are passive transport mechanisms, meaning that no energy has to be added into the system in order for transport to occur, which the cell uses in its selectively permeable membrane. Osmosis involves the transportation, or movement, of water from an area of low solute concentration to an area of higher solute concentration. Diffusion is the movement of solute particles from areas of high solute concentrations to areas of lower concentrations of solutes. Therefore, both osmosis and diffusion work on a concentration
This is an individual study investigating the process of diffusion, osmosis and active transport. To start you should know that substances are moving in and out of cells of your body all the time. To understand and make sense of the cells of your body, you need to know about
Introduction: Diffusion is the movement of molecules from an area of high concentration to an area of low concentration until equilibrium is reached. Osmosis, however, is the movement of water according to its own concentration gradient across a selectively
Results and Observations Test Tube # | Solute Concentration (mol/L-1) | Initial MassI (g) | Final MassF (g) | Change in Mass(F – I) (g) | Percent Change in Mass(F – I) × 100 I | 1 | 0 | 1.3g | 1.6g | 0.3g | 23.08% | 2 | 0.2 | 1.1g | 1.1g | 0.0g | 0.00% | 3 | 0.4 | 1.2g | 1.0g | - 0.2g | - 16.67% | 4 | 0.6 | 1.5g | 1.2g | - 0.3g | - 20.00% | 5 | 0.8 | 1.5g | 1.1g | - 0.4g | - 26.67% | 6 | 1.0 | 1.6g | 1.3g | - 0.3g | - 18.75% | Figure 1.2: Data Table of Results After 24H in Solute Concentration Figure 1.2: Data Table of Results After 24H in Solute Concentration Figure 1.3: Graph of Results After 24H in Solute Concentration Figure 1.3: Graph of Results After 24H in Solute Concentration As we can see in Figure’s 1.2 and 1.3, when there was no sucrose solution, the potato increased in weight. This is due to the fact that the sucrose solution was hypertonic in comparison to the potato slice. Through osmosis, the solution moved along the concentration gradient and into the potato slice making it hypotonic. When there were higher concentrations of sucrose solution, the potato decreased in weight. This is due to the fact that the potato was hypertonic in comparison to the potato. Through osmosis, sucrose from the potato moved along the concentration gradient out and into
Background Information: Diffusion is defined as the movement of molecules from an area of high concentration to an area of low concentration. The diffusion of water molecules through a semi-permeable(selectively permeable) membrane is osmosis. Semi-permeable means that some molecules can move through the membrane while others can not. Diffusion and Osmosis are passive forms of transport requiring no energy. Active Transport utilizes energy in the form of ATP. Water is a solvent that can dissolve a number of substances more than any other substance. Wherever water goes, through the ground or a body, it takes along valuable molecules. Water’s chemical composition causes it to be attracted to many different molecules and be attracted so strongly it disrupts the forces and dissolves it. Water can pass through the semipermeable membrane without any help but can change the solution, on the other side of the cell membrane, depending on how much it diffuses in and out.
Materials move into and out of cells through either passive transport or active transport. Passive transport includes diffusion and osmosis. Molecules tend to move from crowded to less crowded in order to achieve a balance or to reach homeostasis. The cell membrane is selectively permeable which allows the movement of substances, especially oxygen, water, food molecules, carbon dioxide, and waste products, into or out of the cell without the use of energy. Movement occurs when there are unequal concentrations of a substance inside and outside of the cell.
Lab Report Diffusion & Osmosis Experiment Sydney Mask INTRODUCTION All cells in the human body are surrounded by a plasma membrane made up of lipids and proteins which form a barrier. The proteins and lipids in the membrane occupy different roles. The lipids create a semipermeable barrier and the proteins are part of a cross membrane transport. To pass through the membrane a substance goes through a transport known as diffusion. Diffusion is movement of molecules from a high area of concentration to an area of low concentration. There are two different forms of diffusion. One example of diffusion is known as simple diffusion, an unassisted movement of dissolved substances through a selectively permeable membrane (Marieb pg. 54). The
Diffusion and Osmosis Lab Report Introduction: Cells are always in motion, energy of motion known as kinetic energy. This kinetic energy causes the membranes in motion to bump into each other, causing the membranes to move in another direction – a direction from a higher concentration of the solution to a lower one. Membranes moving around leads to diffusion and osmosis. Diffusion is the random movement of molecules from an area of higher concentration to an area of lower concentration, until they are equally distributed (Mader & Windelspecht, 2012, p. 50). Cells have a plasma membrane that separates the internal cell from the exterior environment. The plasma membrane is selectively permeable which allows certain solvents to pass through
Particles are moving atoms; thus they have a habit of moving from areas of high concentration to areas of low concentration. This principle is divided into two classifications: diffusion and osmosis. Diffusion is the movement of substances from an area of higher concentration to an area of lower concentration and
Finally, it could also be a hypertonic solution which is when there is a higher concentration of solute in the solution than in the cell and therefore the water leaves the cell. This make the cell plasmolyzed or “shrunken”. In our experiment this means that the potato cell would
Osmosis can affect blood cells based on the level of the solute. If a red blood cell were placed in a beaker of seawater, the red blood cell would shrink. This shrinking of the red blood cell happens because the seawater has more solute that the cytosol of the red blood cells. This situation causes the water to move out of the red blood cells. Due to the fact that the red blood cell shrunk this environment is considered hypertonic. When a red blood cell is dropped into a beaker of distilled water solution the red blood cell will burst. The reason the red blood cell exploded was because the cytosol has more solute than the distilled water and the distilled water move into red blood cell. This environment is called hypotonic. If a red blood cell is dropped into a beaker of the same solute concentration solution as the cytosol, the water will move in and out of the cell. This creates no net movement of
In the human body, there are many processes happening all while one's day is going on. One process is homeostasis, which is the steady-state physiological condition of the body (Postlethwait, Hopson, 2009, p. 8). For homeostasis to occur, cells rely on the cell membranes to control what substances go into or out of the cell through passive or active transport. Passive transport is the movement of substances across a cell membrane without the use of energy by the cell. In passive transport the easiest way to move substances is through diffusion. It occurs when the solute is in a high to low concentration in the solution, and due to kinetic energy the solute will move until a state of equilibrium exists (Postlethwait, Hopson, 2009, p. 97). Another way to move substances through the cell membrane is through osmosis.
Osmosis and diffusion are two important processes in the human body that help in the functioning of cells and homeostasis, or maintaining balance within the body. Osmosis is the movement of water from a higher concentration to a lower concentration, and its purpose is to maintain stability between a solvent (water) and a solute. Diffusion is the movement of solutes down their concentration gradient, toward a lesser concentration of solutes, in order to pass a membrane, such as the lipid bilayer of the plasma membrane (Tortora and Derrickson 2012). Diffusion requires no energy and is affected by many different aspects including heat, causing the reaction to occur at a more rapid rate, the size of the particle, and the amount of space in which the diffusion must cover (Tortora and Derrickson 2012). Osmosis is a form of diffusion that is more so for water, and both require no energy. The phospholipid bilayer of the cell membrane is a protective barrier against foreign materials that could harm the cell. The membrane is what is defined as selectively permeable (Tortora and Derrickson 2012) because it only allows certain materials get into it, while keeping others from moving out. The bilayer of the membrane has hydrophilic heads, which work well with water, and hydrophobic tails, which repel water. This difference in the head and tails is what causes only certain materials to be able to enter the membrane without help. Materials that can get in are small, gaseous, and
Introduction Osmosis is when water passes through a cell membrane, it is also form of a diffusion, which is a form of passive transport. Osmosis will continue to until an equilibrium is reached which is when the solutions are isotonic. This means that the solution has the same amount of solute on both sides. If the solution is hypertonic, it has more solute in the solution. In this situation water will move towards it. if the solution is hypotonic, it has less solute in the solution. Whereas in this situation, water will move out of the solution.