Diffusion Lab Report
Abstract:
The importance of this computerized simulation study was to gain an understanding of the processes that account for the movement of substances across the plasma membrane, and to indicate the driving force for each. This may also be applied to the study of transport mechanisms in living membrane-bounded cells. Also, understanding of which way substances will move passively through a deferentially permeable membrane depending on the concentration differences. We used PhysioEx software to examine diffusion. In these experiments we used different sized membranes as well as NaCl, urea, glucose, albumin, powdered charcoal, and KCl. The step by step process was used by the software so that we could see the different kinds of reactions. According to the data found, we found that with high molecular weight compounds are too large to penetrate the molecular weight cut off pores and no simple diffusion can occur. So it seemed like the easiest way for a solute to pass through a semipermeable membrane was, if it either was small enough to pass or had some sort of carrier protein that helped it along. We expected to see continuous results that do not have much difference in the five experiments that are to be performed. Experiments were conducted in order to gain a better understanding of a cell’s selectively permeable membrane and the passive processes of simple and facilitated diffusion. The purpose of this experiment was to make observations based on the computerized simulation providing information on the passage of water and solutes through semipermeable membranes, which may be applied to the study of transport mechanisms in living membrane-bounded cells. We hypothesized that when the sucrose concentration will change, the mass will also change.
Introduction:
A molecular composition of a plasma membrane is selective about what can passes through it. There are two methods of transport which can occur through the plasma membrane. To be discussed first, the
The importance of this computerized simulation study was to gain an understanding of the processes that account for the movement of substances across the plasma membrane, and to indicate the driving force for each. This may also be applied to the study of transport mechanisms in living membrane-bounded cells. Also, understanding of which way substances will move passively through a deferentially permeable membrane depending on the concentration differences. We used PhysioEx software to examine diffusion. In these experiments we used different sized membranes as well as NaCl, urea, glucose, albumin, powdered charcoal, and KCl. The step by step process was used by the software so that we could see the different kinds of reactions. According to the data found, we found that with high molecular weight compounds are too large to penetrate the molecular weight cut off pores and no simple diffusion can occur. So it seemed like the easiest way for a solute to pass through a semipermeable membrane was, if it either was small enough to pass or had some sort of carrier protein that helped it along. We expected to see continuous results that do not have much difference in the five experiments that are to be performed. Experiments were conducted in order to gain a better understanding of a cell’s selectively permeable membrane and the passive processes of simple and facilitated diffusion. The purpose of this experiment was to make observations based on the computerized simulation providing information on the passage of water and solutes through semipermeable membranes, which may be applied to the study of transport mechanisms in living membrane-bounded cells. We hypothesized that when the sucrose concentration will change, the mass will also change.
Introduction:
A molecular composition of a plasma membrane is selective about what can passes through it. There are two methods of transport which can occur through the plasma membrane. To be discussed first, the
References: Campbell N., Recce J., Urry L, Cain M., Wasserman S. (2008) Membrane Structure and Function, Pearson 8th edition. Biology vol. 1 Chp 7 pp 125-141. San Francisco, California Marieb E., Mitchell S., (2009) Cell Transport Mechanisms and Permeability: Computer Simulation. Pearson Education. Human Anatomy & Physiology Lab Manual. Chp. 5th pp 53-63. San Francisco, California Marieb E., Mitchell S.(1995)Human Anatomy and Physiology Physio-Ex Retrieved july 4 2010. From web site: http://wps.aw.com/bc_marieb_aplabs_9/58/15037/3849530. cw/index.html