P2 Outline the Main Tissues Of The Body Epithelial Epithelial tissue is basically the linings of both the internal and external surfaces of the body and can be divided into two groups. The groups depend upon the number of layers of which it is composed. These two groups are simple epithelial and compound. Simple squamous are thin, flat plates and their main function is osmosis (which is the passage of water molecules from a region of low concentration to one of high concentration through a semi-permeable membrane) and diffusion (which is the passage of molecules from a high concentration to a low concentration). They form the lining of cavities such as the mouth, blood capillaries, heart and lung alveoli and make up the outer layers of the skin.
In the diffusion experiment, phenolphthalein was added to a beaker full of water. A .5 molar solution of NaOH was added, contained in a dialysis bag. The phenolphthalein dyed the water in the dialysis bag. This demonstrated the diffusion of substances across a selectively permeable membrane. The NaOH molecule was small enough to pass across the bag membrane, while the phenolphthalein molecule was too large.
Explain the function of the following duct components: (57.2) Ell are elbows used to make turns in ductwork, Wye is used to split one large duct into two smaller ducts, Transition is used to change rectangular ducts from one size to another, Boot is used at the end of a round duct to allow connection of a rectangular register or grill. 8. What is the total available static pressure for ductwork for a system with the following specifications? (57.13) 9. Why should air velocity in branch ducts be limited to 600 fpm?
The equipment used during this experiment was a Buchner funnel that is attached to a filter flask with the use of a rubber ring to ensure that suction can occur. Various chemical reactions that occured from mixing the scrap aluminium pieces and potassium hydroxide to get the aluminium into solution. Then the addition of the sulfuric acid to form the valuable compound of alum, the reason we preformed these reactions was to see our ability to create a useful compound as well as see its effectiveness at clearing water that is full of soil and silt. The background of this experiment is that Aluminium is a “reactive metal” but with a layer of aluminium oxide that surrounds the surface acids take a much
Explain your answer. Water itself is an example of a homogeneous mixture. It often contains dissolved minerals and gases, but these are dissolved throughout the water. Is isopropyl alcohol (rubbing alcohol) a heterogeneous or homogenous mixture? Explain your answer.
This technique is highly used on DNA, RNA, and proteins. This technique is all taken place in a gel electrophoresis chamber. The chamber includes a buffer solution, an Agarose gel, a cathode end, and an anode end. The cathode end of the chamber is negatively charged and will attract molecules that have a positive charge, while the anode end is positively charged and will attract molecules that are negatively charged. The buffer solution is used to keep the pH of the experiment at a constant number while carrying ions that are essential to hold a current.
The mobile phase used in this particular experiment was Methanol and 0.1M sodium dihydrogen phosphate at a ratio of 30:70 and a pH of 4.5, slightly acidic. The stationary phase is the silica based particles packed within the column. The key characteristic of HPLC is the sheer pressure it works under. In fact HPLC is often referred to as high pressure liquid chromatography. The pressure at which the machine used in this investigation works is around 1900psi (pounds per square inch) which is the equivalent of 129.29 atmospheres!
Then we just give the sample to TA in order to get the peak. 4. Result and Discussion Steam distillation is a special type of distillation especially for temperature sensitive materials. Many organic compounds, in this case, limonene, tend to decompose at high sustained temperatures. Steam is introduced to the distillation system.
4. Fasten the thermometer to the holder. 5. Submerge the tube half way into the beaker of water that is on the hot plate. Since a beaker is being used, stirring the water consistently is necessary.
With the use of this technique we placed chlorine, bromine, and iodine into solutions containing chloride, bromide, and iodide. In the reaction the free halogen (X2) oxidizes the other halide ion (Y-) and gets reduced by gaining electron(s). In table 3, chlorine was the strongest oxidizing agent and iodine was the weakest oxidizing agent. Since chlorine was the strongest oxidizing agent it will react more and the weak agent will react less. This explanation can be demonstrated in table 3 also because the results of the reactions demonstrates that chloride reacted more by the color of the product compared to the color of chloride in the mineral oil.