Cross screen and star diffractors Diffusion and contrast reduction Close-up or macro diopters, and split diopters or split focus Clear and ultraviolet[ edit ] Main article: UV filter Clear filters, also known as window glass filters or optical flats, are transparent and ideally perform no filtering of incoming light.
The red blood cells would increase in size because water is moving from the area of higher water potential the distilled water to the area of lower water potential the red blood cells until dynamic equilibrium is reached. Lab 1E Questions 1 After preparing a wet mount slide, I have observed the onion cells under magnification and they appear to be small, empty boxes pushed closely together.
Lab 1A — The data collected in this lab experiment did not seem to contain any inconsistencies, so therefore no human error is detected.
Lab 1B — In this lab experiment, the data seems to be compliant with the data collected by the other lab groups, so no human error was thought to have happened. Lab 1C — There was some discrepancy in this experiment in the 1. The data decreases consistently until the 1.
Some mistakes that could have taken place are miscalculations in initial and final masses or problems with the molarity of the solution itself.
Lab 1D — In this part of the lab, only calculations were made, so no human error probably occurred during this time. Lab 1E — In part 1E, after adding the NaCl solution to the onion cells, the cells should have reduced in size, but no reaction took place. This may have occurred in part because the onion itself was already dried out and dehydrated, or while the onion was being looked at through the microscope, the heat from it may have caused the cells to loose water.
During the experiment conducted in Lab 1A, the results and data collected make it possible to conclude that glucose and Iodine Potassium Iodide can pass through a selectively permeable membrane and will if the concentrations on either side are not equal.
In Lab 1B, it can be concluded that sucrose cannot pass over a selectively permeable membrane, but instead water molecules will move across the membrane to the area of lower water potential to reach dynamic equilibrium. Lab 1C provided information that helps to conclude that potatoes do contain sucrose molecules.
This can be stated because the cores took in water while they were emerged in the distilled water. This means they had a lower water potential and higher solute potential than the distilled water.
The solute potential is equal to about a 0. During Lab 1D calculations were made and questions were answered to help give a better understanding of water and solute potential. If the onion cell experiment in part 1E of the lab would have produced correct results, conclusions could have been made.
It is thought that the onion cells would have plasmolyzed due to the addition of NaCl to the cells. This shows how the onion cells had high water potential and moved to the area outside the cell with lower water potential.
Then, after adding water back to the cells, water would have moved back into the cells increasing turgor pressure. The water potential played an enormous role in each part of this lab.
Since water moves areas of high water potential to areas of low water potential, reactions took place in each part resulting in different conclusions being derived from them. Water potential was a key element in each part of the experiment. In plant and animal cells, loss or gain of water can have different effects.
In a plant cell, it is ideal to have an isotonic solution. If the solution is hypertonic, the cell will shrivel from lack of water intake.
Inversely, if the solution is hypotonic the cell could take in too much water and the cell will lyse and break open. For a plant cell, the ideal solution is a hypotonic solution because the cell takes in water increasing turgor pressure which keeps the cells tightly packed and keep their shape.Transdermal applications of drugs present many advantages in terms of absorption, however this is not easily obtained through the transdermal route.
The principle barrier is the stratum corneum and one of the strategies that have been found to promote cutaneous drug penetration is through the use of. Osmosis and Diffusion Abstract. AP Biology Lab One Osmosis and Diffusion.
AP Biology Lab One: Osmosis and Diffusion. Diffusion and Osmosis Lab. diffusion and osmosis. Diffusion is the property of liquid or gas molecules that allow them to move down a concentration gradient in a solution. Osmosis is almost identical to diffusion, but it 5/5(1).
Diffusion And Osmosis Abstract In this Diffusion and Osmosis lab a total of three experiments were performed. For experiment we investigate diffusion through a selectively permeable membrane and the many factors that influence the rates of diffusion.
JNN is a multidisciplinary peer-reviewed journal covering fundamental and applied research in all disciplines of science, engineering and medicine. Diffusion and Osmosis Shown In Solutions. Section 1: Abstract.
This lab, title Diffusion and Osmosis, was centered around the diffusion across a cellular membrane and how exactly materials move and diffuse in concentrations. Both diffusion and osmosis are forms of movement that are part of passive transport dealing with cell membranes. Osmosis and Diffusion: Percent Difference in Mass Based on Sucrose Solution Concentration.
AP Biology, Mod 5. Abstract. The process of osmosis was examined through this experiment using dialysis tubing and potato cores.