I’m pretty sure we have had this discussion before so i’ve got one of my old copypastas from a previous thread. >> Force travels through solid objects at roughly the speed of sound in that object‚ if you force a piece of an object to move at greater than the speed of sound through that medium it will simply tear whatever is holding it together without transmitting force to the surrounding structure. this gives a kind of hole punch effect if the projectile is moving faster than the speed of
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Sciatic Nerve pain in your lower back that sometimes radiates down your leg and you find it impossible to sit down comfortably? Relief is on the way! The Sciatic Nerve is actually three nerve endings that exit the base of your spinal column‚ then travel across your buttocks and down the backs of your legs. Along this path your Sciatic Nerve passes through several thick muscles. When these thick muscles‚ like your Hamstrings or Piriformis Muscle tighten up‚ they can swell and press on the nerve which
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Experimental Gerontology 45 (2010) 81–90 Contents lists available at ScienceDirect Experimental Gerontology journal homepage: www.elsevier.com/locate/expgero Review Aging and the force–velocity relationship of muscles Isaac Selva Raj a‚*‚ Stephen R. Bird a‚ Anthony J. Shield b a b Royal Melbourne Institute of Technology‚ Australia School of Human Movement Studies‚ Faculty of Health‚ Queensland University of Technology‚ Kelvin Grove Campus‚ Victoria Park Road‚ Kelvin Grove‚ Queensland
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Question 3 Using any peripheral nerve bundle as a model‚ describe using figures (a) the general anatomical structure with key constituents identified and (b) the heterogeneity in the electrical conductivities of the different constituents. For this question‚ I will be using the sciatic nerve as my model. The sciatic nerve consists of several main structures as can be seen in Figures 5 below. Figure 5: Cross section of the sciatic nerve. The inset in the top image shows individual fibers wrapped
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Introduction Neurons (also known as neurons‚ nerve cells and nerve fibers) are electrically excitable and the most important cells in the nervous system that functions to process and transmit information. Neurons have a large number of extensions called dendrites. They often look likes branches or spikes extending out from the cell body. It is primarily the surfaces of the dendrites that receive chemical messages from other neurons. One extension is different from all the others‚ and is called
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There are three main nerves in your hand radial nerve‚ median nerve‚ and ulnar nerve. Each one of these gives movement and feeling to different areas of the hand. The ulnar nerve is one of the three main nerves in your arm. It travels from your neck down into your hand. The most common place for this nerve is behind the inside part of the elbow. The radial nerve descends down the arm with in the triceps with in the upper arm. Then moves down the arm within the humerus also known as the radial
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The Germen chemist Dr. Gerhard Schrader was given a task to develop a pesticide. In just two years tabun was born‚ it had extremely high toxicity and was the first of the substances later referred to as nerve agents. A factory was built and produced during the years of 1942-1945 12‚000 tons of the chemical warfare agent tabun was made; in which the allies took large quantities of tabun at the end of the war. Even though Hitler and his army were losing the war‚ Schrader and his co-workers synthesized
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Name:shasou Exercise 3: Neurophysiology of Nerve Impulses: Activity 5: The Action Potential: Measuring Its Absolute and Relative Refractory Periods Lab Report Pre-lab Quiz Results You scored 50% by answering 2 out of 4 questions correctly. 1. Which of the following occurs after the peak of the action potential? Your answer : b. Voltage-gated K+ channels open. Correct answer: d. All of these occur. 2. What is meant by Na+ channel inactivation? Your answer : a. The Na+ channel opens when the membrane
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as plotting of the data on the graph. The velocity versus time graph came out to be a quadratic model‚ having a number of curves. Since this is based off of original measurements‚ any mistakes in measuring would have been multiplied when the velocity was calculated‚ so human error could be prevalent here as well. Conclusion Our hypothesis was only partially supported. The position versus time graph was a linear model‚ as predicted‚ but the velocity versus time graph was quadratic‚ not supporting
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initial height. A motion detector is mounted on the ceiling directly above the ball‚ facing down. So‚ the positive direction -- the away-from-the-detector direction -- is downward. Draw the position‚ velocity‚ and acceleration graphs. Since moving downward is a positive direction‚ is the velocity positive when the ball falls‚ 0 when it hits the ground‚ and then negative when it moves up? Is the accerlation positive (9.8) as the ball falls‚ very positive when it hits the ground‚ and then neg (almost
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