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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ear infection. Otitis refers to an ear infection and media means middle. So‚ acute otitis media is an infection of the middle ear‚ which is located behind the eardrum. When should a parent suspect a infection? When a child becomes ill with fever‚ is irritable‚ and usually complains of pain in the ear. Many children who develop ear infections will first have colds. However‚ ear pain can be caused by other problems‚ such as a sore throat‚ without an ear infection. Ear infections are
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Most P. aeruginosa infections occur in hospitalized patients‚ particularly those who are immunocompromised. P. aeruginosa is a common cause of infections in ICUs. HIV-infected patients‚ particularly those in advanced stages‚ are at risk of community-acquired P. aeruginosa infections. P. aeruginosa infections can develop in many anatomic sites‚ including skin‚ subcutaneous tissue‚ bone‚ ears‚ eyes‚ urinary tract‚ and heart valves. The site varies with the portal of entry and the patient’s vulnerability
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common pathogen in nosocomial pneumonia. It is hospital acquired infection that the hospitals eat up the cost of treatment. Although pneumonia can be prevented‚ it is still an infection that we find in hospitals all across the United States. Pneumonia is a dangerous infection in patients who are already immunosuppressed and get pneumonia as a secondary infection. Preventative measures need to be taken to prevent such infections in the perioperative stages. Nursing Concepts Module A Amy Kramer
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processes used within the organisation‚ or within one business unit of the organisation. Sydney’s Harbour Café comprises several systems and processes. The main ones are listed below: Finance Human Resources Sales and Marketing Suppliers 2- Outline the strategies you will use to monitor and evaluate the performance of these key systems and processes. To be able to monitor performance we have to know our current position. our current position in our systems and processes is in the beginning
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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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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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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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Ebola Outbreak Timeline http://www.newsday.com/news/world/theebolacrisis15importantmomentsin20141. 9454173 December 6th‚ 2013: A twoyearold child died in Meliandou in southern Guinea and was later identified as "patient zero". The virus remained localized until February 2014‚ when a healthcare worker in a neighboring province died. First ebola patient ‚ the outbreak started with patient zero contaminated two more people which caught the attention of the general public once r
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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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