Tonicity

The purpose of Activity 1 of this lab is to understand how cell transportation works, The purpose of the second part is to explore semipermeable membranes. The purpose of Activity 3 is to explore how the size of a cell affects cell transportation. Background All cells are surrounded by a barrier called the cell membrane. It regulates what enters and leaves the cell, and also protects and supports the cell. Cell membranes are semipermeable, meaning it doesn’t allow all molecules to pass through…

Microorganisms invasion of the dental pulp as a sequel to dental caries,trauma,and operative dental procedures causes pupal infection and periapical diseases2-3 9-10 The aim of endodontic treatment is to eradicate bacteria from the root canal and prevent reinfection9 (the effectiveness of various Alexanda almyroudi) Endodontic treatment includes the cleansing of pulp tissue and bacteria from infected root canals. This is performed mechanically by files and supported by irrigation with…

Introduction: Sildenafil Citrate (API) is more commonly known by its trade name, Viagra. The drug was discovered by Pfizer. It is used to treat penile dysfunction in men. The drug was firstly created in the 1990’s and was to be used as a treatment for high blood pressure, angina and chest pain. During Trials it was discovered that the drug had insignificant effect on angina. In turn an unexpected side-effect was discovered. The drug gave men a penile erection and sustained it for a period of…

IV. Discussion The Concentration Gradients is known as known as diffusion. They are spontaneous process because there is no energy input at the beginning (Reece et al., 2011). Each substance could diffuse to its own concentration gradient without affected by the concentration of other substances (Scott 2015).In the first experiment of the Concentration Gradients. The color of the clear water was expected to change into the color of the potassium permanganate dye, which was purple. Observation…

I. Introduction: Osmosis is a mode of passive transport used by the cells. It involves the transport of a solvent like water across a semi-permeable membrane. Osmosis is the movement of solvent molecules from an area of low solute to an area of high solute. In osmosis, the semi-permeable membrane (the lipid bilayer) enables the solvent molecules to pass freely between but limits movements of the solute. Osmosis is the primary way water moves into and out of all cells. In this experiment, the…

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…

According to recent studies, it has been proven that students with disabilities benefit in various developmental areas when they are included in classrooms with their typically developing peers. In the year Two Thousand, Annette Holahan and Virginia Costenbader conducted a study where they compared the developmental gains of preschool aged children in both inclusive and self-contained classrooms. The study consisted of fifteen matched pairs of students. Students were matched on a variety of…