Mucous membrane

Part 1 DB 2 “The plasma membrane allows fluids or gases to pass or diffuse through to specific molecules. It allows nutrients and other vital elements to enter the cell and waste materials to leave the cell. Oxygen, water, and carbon dioxide pass freely across the membrane, but amino acids and sugars are carefully regulated (University, 2015).” When thinking of an analogy for plasma membrane, what comes to mind it the stomach and digestion of food and how it reacts to food, filter foods, and…

Principle Dialysis works on the principles of the diffusion of solutes and ultrafiltration of fluid across a semi-permeable membrane. Diffusion is a property of substances in water; substances in water tend to move…

1a. Osmosis: Osmosis is the diffusion of water across a selectively permeable membrane. Cell membranes have pores that are where molecules pass through the membrane. These pores are too small for some molecules like sugar to pass through, but are large enough for water molecules. These water molecules move across the membrane from areas of low concentrations of solute to high concentrations of solute. The different concentrations affect the water level. However, when a solution is dilute, the…

Mitochondrion are made of two membranes. The outer membrane covers the organelle and acts as a layer of skin, whereas the inner membrane constantly folds over and creates layered structures called Cristae (The constant folding increases the surface area of the organelle). And the fluid inside the organelle is called the matrix. The matrix carry the specific DNA and ribosomes for the mitochondria, because the organelle carries its own DNA. Site of aerobic respiration and provides energy (ATP) to…

Na+/K+ Pump and the Secondary Active Transport of Glucose The concentration gradient of sodium ions produced by the sodium potassium pump possesses potential energy that is utilized as sodium ions move down the concentration gradient during secondary transport. [5]. The sodium gradient propels the absorption of glucose in the glucose sodium cotransporter, SGLT1 [6]. SGLT1 uses the sodium gradient to move the glucose molecule down the gradient since it does not have its own energy to do so [6].…

The hypothesis could be proven. If water is filtered through a pine dowel, then this permeable wood will filter the impurities out of the water through the process of osmosis. The water will pass through leaving the impurities behind. This experiment did prove the hypothesis however, it may have worked better if more time was allowed for most of the water to go completely through the wood, if the wood were less dense, and if the dirt in the water wasn’t so fine. In my experiment I observed that…

The main objective of the experiment is to study and localize the fluorescent tags on specific chimeric proteins in a particular cell. The localization of these tags will generate a detailed understanding of the cytoskeleton in the cell, and the main function of using the Enhanced Yellow Fluorescent Protein. With the help of EYFP, the location of the proteins, and the molecular masses of the chimeric proteins should be really easy (Cannons, A. 2006). Consequently to better understand this…

molecules pass through the artificial membrane? Why or why not? Hypothesis: Tiny molecules have an easier time passing through the plasma membrane than larger molecules. Molecules that are greater than fifty atoms do not pass through the artificial membrane. This is due to its composition consists of thousands of atoms. Glucose is able to diffuse through membranes as its genetic makeup contains twenty-four atoms. Chloride Ions are also able to penetrate the membrane as it only contains a single…

might include membrane size, pressure, etc. Water being the solvent moves in between a semi-permeable membrane in one direction always from the less concentrated area to a high. The semi-permeable passage is the major reason osmosis only deals with water, as its properties only allow certain components to flow through. The membrane contains small holes in which small molecules such as water can pass through. During this movement weather the water is moving in or out of the membrane the tonicity…

Evidence for and against the Davson- Danielli model of membrane structure The plasma membrane is thin and has double layers. The plasma membrane has two dark lines and a lighter central region. The two dark lines suggests the presence of the protein on either side. The lighter central region suggests the presence of phospholipids. The dark grainy appearance could be the ribosomes. Ribosomes appear as dark granules in the cytoplasm. Measured by rule: approximately 1 mm actual size 10 nm…