The formation of an action potential can be divided into five steps. (1) A stimulus from a sensory cell or another neuron causes the target cell to depolarize toward the threshold potential. (2) If the threshold of excitation is reached‚ all Na+ channels open and the membrane depolarizes. (3) At the peak action potential‚ K+ channels open and K+ begins to leave the cell. At the same time‚ Na+ channels close. (4) The membrane becomes hyperpolarized as K+ ions continue to leave the cell. The
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Redox potential – CV Acetonitrile Adjusted sensitivity Each ;line represents diff scan rates all been overlayed on one digarm Scan rates ranged from 0 .1 s-1 to 1 Peak due to iodide oxidation is read from +peak to – peak bottom line. Iodide to triiodide Glycol Didn’t work Using equation ip = 2.69 ×105 n3/2 A D1/2 C ν1/2 compare to linear equation y = mx+c y = peak current x = V1/2 c = zero Therefore m is = everything else C = concentration 0.05 M ethylene glycol (acetonitrile
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THE WORK DONE BY A CONSERVATIVE 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
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which cell has the larger resting membrane potential? Explain. If the permeability to K is higher in A than in B‚ then the resting membrane potential (rmp) will be closer to the equilibrium potential in cell A‚ which means the rmp will be more negative in cell A than in cell B; or in other words‚ the potential difference will be LARGER in cell A. 2. Predict the effect of a reduced extracellular concentration of Na+ on the magnitude of the action potential in an electrically excitable cell. If there
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Potential Energy • Definition and Mathematics of Work • Calculating the Amount of Work Done by Forces • Potential Energy • Kinetic Energy • Mechanical Energy • Power An object can store energy as the result of its position. For example‚ the heavy ball of a demolition machine is storing energy when it is held at an elevated position. This stored energy of position is referred to as potential energy. Similarly‚ a drawn bow is able to store energy as the result of its position. When assuming
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UNIVERSITY ENTRANCE EXAMINATION PHYSICS Duration : 2 hours Please read the following instructions carefully. 1. This paper is made up of 50 Multiple-Choice questions and comprises ELEVEN (11) printed pages. 2. Do not write on the question paper. 3. Answer all questions and indicate your answers on the answer sheet provided. Marks will not be deducted for wrong answers. 4. Do not take any paper‚ including the question paper or unused answer sheets‚ out of the examination
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MANAGING HUMAN CAPITAL IN A GLASS COMPANY Research conducted into the Human Resource Management of an organisation Based on the author’s choice of organisation: TASK 1 Evolution of Human Resource Management And Current Market Context Within A Selected Organisation TASK 2 Recruitment & Selection – Strategic Human Resource Initiatives - Recommendations TASK 3 Approach to HRD – Improvements TASK 4 Classical Motivation Theories – Hybrid Theory Tailored To The Organisation TASK 5 Change
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Discover Your Products’ Hidden Potential by Ian C. MacMillan and Rita Gunther McGrath A simple matrix helps you identify the attributes that will make your goods and services most competitive. Why did a minor math error that would occur only once every 27‚000 years so enrage customers that it briefly threatened to derail Intel’s Pentium chip? And how could a feature as trivial as an inexpensive cup holder swing millions of customers to purchase a $17‚000 automobile—particularly when only
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Geographic luck theory is that some countries developed faster with the resources they had than others and got more advanced in ways with guns‚ germs‚ and steel‚ therefore were able to obtain much of the world. It gave some people an advantage over others that enabled them to gain wealth‚ power‚ and strength. Geographic luck challenges the traditional explanation of inequality that claims certain races and ethnicities are genetically and culturally superior and inferior. Weaponry is a factor that
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Introduction Munchy’s company is one of food company type which in variety of biscuits‚ wafers‚ cracers and cookies type. In Malaysia‚ the headquarters succesfully established at Johor‚ around 1991. The Munchy’s term was derived from the Mandarin term “Mai Oi”.”Mai” which means flour or wheat and “Oi” that refers to the magical quality found in it’s delicious wafer.Nowadays‚ the brands distributed all over country including Asia Pacific‚ Europe‚ Middle East‚ Africa‚ North America and Latin America
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