Classification of Body Membranes Laszlo Vass‚ Ed.D. Version 42-0010-00-01 Lab repOrt assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions‚ diagrams if needed‚ and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable file which can be sent
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The Ionic mechanism and propagation of action potentials. The action potential is the result of a large‚ sudden increase in sodium permeability of the membrane. The resulting rush of sodium ions into the membrane and accumulation of positive charge on its inner surface drives the potential towards Ena. This is followed by repolarisation‚ whereby there is a large increase in the membranes permeability to potassium ions‚ hence the membrane returns to Ek. Explanation of the (ionic) mechanisms underlying
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equilibrium potential and use the Nernst equation (see Appendix) to show how the equilibrium potentials for both sodium and potassium are calculated. Equilibrium potential is the potential of the membrane when there is no net flow of ions from one gradient to the other gradient. The ions are equal and are opposite of each other but not moving from one side to the other. Sodium: Ena=2.303((8.31 J m-1 K-1)(310K))/((1(= 9.65 x 104 c m-1))(log(150/15))= 61.54 mV Ek=2.303((8.31 J m-1 K-11)(310K))/((2(=
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Table of Contents 1.0 Aim: The aim of this experiment is to determine how the height of a horizontally launched projectile affects the projectiles range. 2.0 Theory: Galileo showed an appreciation for the proper relationship between mathematics‚ theoretical physics‚ and experimental physics. Galileo discovered that a parabola was the theoretically ideal trajectory of an accelerated projectile in the absence of friction and other disturbances. Galileo agreed that there are
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Interpretation of Data When looking at my results i can safely say that the change in HCl concentration does affect the rate of reaction with the Calcium carbonate pebbles. The relationship between the change in HCl and reaction rate can be seen in the graph and raw data table presented above. If you compare the lowest concentration with the highest concentration you’d be able to see that there is a very large contrast between their averages. The average gas production of 0.1M HCl was 0.00693 kPa/s
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Factors that affect how the PH changes during a titration experiment. Concentration of the alkali Having a higher concentration of alkali will mean that there will be more molecules closer together for the acid to collide with. This will speed up the reaction as collision theory suggests that molecules have to collide to react and if there are more molecules to collide with the reaction will happen faster as there is a higher chance of a collision. Volume of alkali An increase in volume would mean that
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a system of rules and guidelines which are enforced through social institutions to govern behavior. The law affects politics‚ economics and society in various ways and serves as a social arbitrator or intermediates of relations between people. Ethics according to Miriam Webster’s dictionary on the other hand can be defined as a system of moral principles. Our key word being “moral”‚ how can we figure out if something it is moral? The branch of philosophy that ethics deals with is values related
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A Literature Review of K-12 Virtual Learning Communities Virtual learning environments‚ often referred to as online learning or e-learning‚ have proliferated both at the K-12 and the adult levels. Formal virtual learning communities (VLCs) at the K-12 level however‚ are relatively new phenomena. Traditionally‚ literature regarding online learning has focused largely on technology and learner-computer interaction. These isolated computer-mediated environments where the need for community and human
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FORCE ALWAYS HAS FOUR PROPERTIES: 1. It can be expressed as the difference between the initial and final values of a potential-energy function. 3. It is independent of the path of the body and depends only on the starting and ending points. 2. It is reversible. 4. When the starting and ending points are the same‚ the total work is zero. The total mechanical energy ME = K + U is constant. Object moving in a uniform gravitational field gravitational a U = Fh = mgh d ha F=mg Wab =
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from areas of high concentration to low concentration‚ thus requiring no energy. Many of the substances that enter or leave the cell do so through diffusion. Osmosis‚ a type of diffusion‚ is the movement of water across a selectively permeable membrane. In osmosis‚ water diffuses across the area of lower solute concentration to that of higher solute concentration until the solute concentrations of the environment and the cell are equal. Tonicity‚ which is the ability of a solution to gain or lose
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