P-n junction

    Page 1 of 23 - About 221 Essays
  • HCSMA Case Studies

    Case Study: Hereditary Canine Spinal Muscular Atrophy Genetic Background Hereditary canine spinal muscular atrophy (HCSMA) is proven to be an autosomal-dominate disease that affects most noticeably the Brittany spaniel (Pinter MJ, Waldeck RF, Wallace N, & Cork LC, Motor Unit Behavior in Canine Motor Neuron Disease, 1995). HCSMA originated as a spontaneous mutation in the Survivor Motor Neutron gene found in the purebred Brittany spaniel population (Ericsson. A & Rubin. C, 2012). Due to the co-dominate nature of the disease there are slight variation in the phenotype expressed in the diseased population, the homozygous individuals will be affected by the disease much earlier than the heterozygous individuals (Pinter MJ, Waldeck RF, Wallace N,…

    Words: 1889 - Pages: 8
  • Biceps Muscles Lab Report

    Figure 1. An EMG Tracing of Triceps and Biceps Muscles Co-activation. EMG signal produces an electrical activity of the muscle fibers active at a moment time. The electrical activity is measured in millivolts per milliseconds. The top channel shows the bicep EMG, while the bottom EMG correlates to the triceps contraction traces. Shown on the top graph, there are two periods of bicep activation, each last approximately 1.5ms. When the biceps are activated, it produces increasing amplitude peaks,…

    Words: 811 - Pages: 4
  • Maximum Contraction Lab Report

    Introduction: Temperature can affect the rate at which an action potential is generated to excite an action potential within a given skeletal muscle. Maximum contraction is the ability of the muscle to recruit and produce its greatest force during a contraction, and we can observe these effects by using a grip force transducer, which records the functional grip force of the hand. Therefore, the purpose of this lab was to discern how varying temperatures affect maximum contraction. I…

    Words: 732 - Pages: 3
  • Amyotrophic Lateral Sclerosis

    A nerve cell is also called a motor neuron, which is made from a cell body, an axon and axon terminals. The cell body contains a nucleus and dendrites that receive the signals and send it down the axon that is covered in myelin sheath. The axon terminals are connected to the muscles creating a neuromuscular junction. This is where the signal is relayed to the muscle. There are two groups of motor neurons: upper and lower. Upper motor neurons are those found in the brain and lower motor neurons…

    Words: 1129 - Pages: 5
  • Motor Neurone Disease Theory

    The process that is used by nurses and clinicians to consider a patient situation, collect data, process this data, make goals and implement interventions, evaluate outcomes and then finally, reflect on the learning outcomes from this process, is known as clinical reasoning (Hoffman, 2007). Clinical reasoning cycle is the tool that is used for the process of clinical reasoning. This paper will discuss management of Motor neurone disease using the clinical reasoning cycle as a framework. However,…

    Words: 1445 - Pages: 6
  • Tpk-Trypsin Lab Report

    expect to see a reduction in the viral titer in the DF-1 cells that are stably expressing viperin compared to the DF-1 cells that are transfected with an empty vector. Objective 4: Identification of the critical regions and residues important for duck viperin function and localization. Viperin consists of three distinct domains; an N-terminal domain that varies considerably between species and contains both an amphipathic helix and a leucine zipper domain; the N-terminal domain plays an…

    Words: 1819 - Pages: 8
  • Summary Of Mayan History By Clendinnen

    Clendinnen recounts the history of the Yucatan peninsula once the Spanish arrived. She splits her recounting into two sections: the Spanish’s perceptive and the Mayan’s perspective. Clendinnen’s recounting the Spanish side of history demonstrates a struggle not only between the Spanish and the new land and its inhabitants, but also the internal conflicts between the Spanish settlers and the friars. At first she tells us how the Spaniards’ interactions with the natives consisted of tribute…

    Words: 746 - Pages: 3
  • Personal Narrative: Wrong Time In Mexico

    Have you ever heard the saying, “wrong place, wrong time,” or maybe that life is about “being at the right place at the right time”? Or have you ever heard about the cartels and their crimes down in Mexico? Murders, kidnapping, drug trafficking, and lots of partying goes on every day by every cartel and by every drug lord south of the border. Unfortunately, these two topics have much in common in Mexico. Civilians that do not have anything to do with the cartels get caught up in these kind of…

    Words: 1170 - Pages: 5
  • Classic Maya Collapse Essay

    Climate Change and Trade Networks as Causes of the Classic Maya Collapse The ancient Lowland Maya were a thriving and advanced society, capable of building great monuments able to survive to the present. It is therefore a mystery as to why, at the end of the Classic period from the eighth to eleventh century, Maya sites show signs of massive decline and desertion; this is referred to as the “collapse” of the Maya, though it was not an immediate or evenly distributed phenomenon (Douglas,…

    Words: 1544 - Pages: 7
  • Born Ready By Frida Kahlo Analysis

    about the difficulties she went through from being a young middle schooler to attending college at Harvard. She tells various situations of having been raised in Washington, D.C. and later on moving to Hawaii. At the beginning of the article Lawrence is riding home from school on a bus when a white man boards it. He is the only white person on a bus full of melanin and yet he feels the need to say the n-word. The aftermath was unbearable for young Kimiko, she wrote, “As I walk home from the bus…

    Words: 1724 - Pages: 7
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