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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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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A graded potential in physiology‚ is described as local changes in membrane potential that occur in varying grades or degrees of magnitude or strength. When compared to graded potential‚ an action potential is described as brief‚ rapid‚ large (100mV) changes in membrane potential during which the potential actually reverses so that the inside of the excitable cell transiently becomes more positive than the outside. As with a graded potential‚ an action potential involves only a small portion of
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WHAT ARE THE HEALTH BENEFITS OF EXERCISE? Physical exercise is very important for a healthy body. To stay healthy and fit‚ we need to exercise regularly. Most people believe that exercise and work are the same. They believe that if they exert effort‚ flex their muscles during work‚ it is already an exercise. But exercise and work are not the same thing. Although both expend energy‚ exercise has an element of pleasure. When you work‚ you become tired‚ the same as when you exercise. But in exercise
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give you new career options. College gives opportunities like internships and new jobs with benefits. Co-founder of Bellwether Education Partners‚ Andrew Rotherham states that‚ “College graduates are also more likely to be in jobs with better benefits‚ further widening the divide.” (SB 1.18) Not only will there be more options‚ but there will be the option to choose specific jobs based purely on their benefits. Advantages like better
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month‚ instead of several loan payments every month over time. This saves the student both time and money. Having a lower interest rate and less checks to write every month are a couple of advantages of doing a student loan consolidation. 5 Helpful Benefits of Student Loan Consolidation 1. Lower Monthly Payments. Depending
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WHAT ARE THE BENEFITS OF READING BOOKS? 10 Benefits of Reading (or Ways Reading Makes You Better at Life) I’ve found that no matter what I read‚ the act of reading every day has helped me in nearly every aspect of my life. Here are a few of my favorite ways that reading has improved my quality of life‚ and will definitely improve yours. 1. Mental Stimulation Studies have shown that staying mentally stimulated can slow the progressof (or possibly even prevent) Alzheimer’s and Dementia‚ since keeping
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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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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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Venture Budgeting and Forecasting Kyra M. Johnson Finance 375 Robert Sparks June 4‚ 2012 Venture Budgeting and Forecasting Many Americans live with self-care disabilities. The Americans who chose to remain home is increasing as the cost of assisted living facilities increases. The decision to remain in home stimulates from the increasing cost of assisted living facilities as well as the ease of remaining in a familiar environment. Though the decision brings challenges‚ many Americans chose
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