Title: Alexandra Whitaker, Ms.Dayton, 12/23/16, 2.03 lab permeability Objective(s): The main purpose is to find out if plastic bags are permeable to starch and, or, iodine. Also, to find out wither potatoes are hypotonic, hypertonic, or isotonic by testing the different amounts of sucrose solutions Introduction: The necessary background information needed for this lab is the definition of osmosis, diffusion, active transports, passive transports, permeability, concentration, tonicity, and to now the scientific concepts of hypotonic, isotonic, and hypertonic. Hypothesis: For part 1 my hypothesis is: That the starch will diffuse across the plastic bag and react with the iodine and will have a color change to the water to imply the reaction…
Introduction: Osmosis is the diffusion, the process by which solutes move down their concentration gradient, from higher concentration to a lower concentration, of free water across a selectively permeable membrane. The water moves from the higher free water concentration to the lower or the lower solute concentration to the highest. When the exterior of the cell has a higher free water concentration water will flood in and make the cell swell up. This process increased the size of the central vacuole, otherwise known as being turgid. A turgid is the healthiest state for most plant cells.…
This lab provided a good perspective of the movement of molecules diffusing and going through osmosis into a cell. The ability of the cell membrane to be selective was illustrated by it not allowing all the molecules through (starch). This shows how in a real cell it can differ between essential and nonessential or invading molecules. Lastly, It gave a good example of hypertonic solutions and how the concentration gradient…
Hypotonic is the process of water moving into the egg from the outside; the egg becomes swollen. Isotonic is when the water concentration is the same inside as is it on the outside. Diffusion is the movement of solute, a substance, from a high concentration to an area of low concentration. All of this is possible through the organelle known as the plasma membrane. The function of this…
When osmosis is applied, it dictates that the movement of water across cell membranes and the balance of water between the cell and its environment (Reece et al., 2011). On the first experiment of the effects of Osmosis on Potato cell, the plain potato was compared with a potato that had salts on. The plain potato was the negative control, and it changed to brown color after waiting for a certain amount of time. That happened because the potato cell was broken when it was cut, and the enzyme inside of the potato oxidized. On the other hand, the potato with salt did not turn color but having water on top of it.…
Diffusion is the movement of molecules from an area of high concentration to an area of low concentration. Osmosis is the diffusion of water molecules…
Facilitated diffusion 13. In this transport process, the energy from hydrolysis of ATP is used to drive substances across the membrane against their own concentration gradients. o. Primary active transport 14. If the solute concentration is greater in the solution on the inside of the cell, compared to the solute concentration of the solution that is outside the cell, then what direction will water move? p. into the cell 15.…
During osmosis water moves down the concentration gradient. This means that the water moves from an area where it is more concentrated…
Questions: (a) Show that: (b) What value of ε ss would you expect at 800°C and 16000 psi? A= 0.0043 Using your Larson-Miller curve, what temperature should you use for a life of 20 years at the lowest stress level? For the extensive length of time, a temperature of approximately 25 oC which is close to room temperature. With increasing stress or temperature, what changes will you notice in a typical creep curve?…
Amber Rosales Marco Avalos Lab Section 2011. 21 1 October 2015 Diffusion and Osmosis There are many processes and systems that help maintain our body’s homeostasis and ability to function. These processes can be traced right down to a cellular level. However, if a process at this level were to be disrupted, it can create a ripple affect that can target major life functions or cause a long-term illness.…
Passive transport, more commonly known as osmosis, is a theory which recognises the biological process where water and other molecules move across biological semipermeable membranes into a region of higher solute concentration. Terms which are…
The hypothesis that if sucrose concentration is placed in one of the model cells then the rate of osmosis will increase was supported by the data in this study. To start with, the tap water without any sucrose concentration (M) started at 4.87g and ended with almost the exact same mass after 60 minutes had passed. On the other hand, when 1.20 M of Sucrose Concentration was emerged in water for 60 minutes and pulled out, its mass went from 6.48g to 9.03g.. Osmosis is the net flow of water through a semipermeable membrane. It is basically a unique form of diffusion where the water is the only molecule able to diffuse through the membrane (Wood-Robinson, 2001).…
Osmosis is the tendency of a fluid, usually water, to pass through a membrane into a compound where the solvent concentration is higher (Osmosis). These two terms are different because osmosis refers to fluids going through membranes, while diffusion can be any molecule (Haneef, Kochunni Jazir). Osmosis is a specific type of diffusion (What is...). A selectively permeable membrane is a material that only allows specific substances to pass through it (Selectively permeable...). This affects diffusion and osmosis because the processes are sometimes not permitted if the membrane is selectively permeable (Selective permeability).…
Osmosis is the net movement of water towards higher concentration. In osmosis experiment, water likes to diffuse from an area of low-solute concentration to an area of high-solute concentration. The purpose of the osmosis experiment was to observe the diffusion of solutes and the osmosis of water through a semipermeable membrane, which was dialysis tubing. This experiment was done to examine, if the solution is hypertonic, hypotonic or isotonic.…