Introduction Cells like to have some control over what gets in and what goes back out. This is called selective permeability (Tamarkin 2011). Two ways small particles can get past the cell membrane are through diffusion and osmosis (Tamarkin 2011).The terms diffusion and osmosis refer to the way small particles move. They are both examples of passive transport (Tamarkin 2011). Diffused particles move in a concentration gradient (Tamarkin 2011), which means they both move from areas of high concentration
Osmosis and diffusion are two methods which work towards levelling the concentration gradient in the two given surfaces – the cell and the environment. Osmosis can be defined as the passive movement of water from a higher concentration to a lower concentration through a semi permeable membrane. Tonicity is how capable is a solution to change the size of the cell that is placed in it. Based on this measure, osmosis is divided into three groups: hypotonic, isotonic and hypertonic. A red blood cell
Brookelyn Snider Biology Lab 261 The Effect of Diffusion and Osmosis on White Potato vs. Sweet Potato Introduction: The purpose of this experiment was to develop an understanding of water—solute balance. In this experiment, sweet potatoes and white potatoes were used as model systems. (Bio 261 Lab Manual) Diffusion is the movement of particles from an area of a higher concentration to one of a lower concentration. In this experiment this would be the movement of particles
Kaitlyn Camp 111-501 The Properties of Water; Osmosis and Diffusion Report In the process known as “osmosis”, a solvent will permeate from a solution of low solute concentration to a solution of high solute concentration. Due to this process, there are three terms that are used when describing solute concentrations in a solution relative to another. These terms are: isotonic, hypertonic, and hypotonic. According to the lab manual, isotonic is when “two solutions, separated by a semipermeable membrane
Osmosis Lab Report BIO 2101-02 Jasmine Monger (+Tayshondalyn Huntley, Brandi Burke, Jasmine Vann) Dr. Carly Kemmis December 5, 2014 Introduction Osmosis is the movement of water from a low concentration to a high concentration across a different permeable membrane. When talking about osmosis three terms are usually connected to it or heard during the same time. Those three terms are hypotonic, hypertonic, and isotonic. These three terms can be categorized as the tonicity, amount of solute
BIOFUELS Two problems roused the world’s concern in recent years. One is energy crisis caused by the squandering of petroleum fuel. Second problem is environmental problems such as greenhouse effect, global warming, etc. To deal with such problems, renewable sources, utilization technology and bioenergy production technology have been developed. Bioethanol as one of the biofuel can be blended in different proportions in automobiles with gasoline. Biobutanol is also a new biofuel (Liu, Wang, & Zhang