deficits in the long term memory in children [3]. Inorganic arsenic modulates locomotor activity and behavioral task suggesting the impairment of sensory and motor nerves [4]. Epidemiological studies reveal that chronic arsenic exposure through drinking water causes cerebral infarction‚ microvascular diseases and impairment in neural conduction [5]. A significant elevation of malondialdehyde level in response to arsenic exposure is noticed with a decrease in mitochondrial- and cytosolic- superoxide
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muscle contraction Introduction For a skeletal muscle fiber to contract‚ a stimulus must be applied to it. The stimulus is delivered by a nerve cell‚ or neuron. A neuron has a threadlike process called and axon that my run 91 cm or more to a muscle. A bundle of such fibers from man different neurons composes a nerve. A neuron that stimulates muscle tissue is called a motor neuron. The motor neuron branches into terminal structures called telodendria that come into close approximation with
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sympathetic division has thoracolumbar “outflow”‚ meaning that the neurons begin at the thoracic and lumbar (T1-L2) portions of the spinal cord. The parasympathetic division has craniosacral “outflow”‚ meaning that the neurons begin at the cranial nerves (CN 3‚ CN7‚ CN 9‚ CN10) and sacral (S2-S4) spinal cord. The ANS is unique in that it requires a sequential two-neuron efferent pathway; the preganglionic neuron must first synapse onto a postganglionic neuron before innervating the target organ. The
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1. Wavelength of short ultraviolet radiation is: A. 700-1500 mµ B. 1600-12‚000 mµ C. 0.1-3 mm D. 180-290 mµ 2. Wavelength of long ultraviolet radiation is: A. 700-1500 mµ B. 290-400 mµ C. 180-290 mµ D. 0.1-3 mm 3. What ultraviolet wavelength will produce reticuloendothelial stimulation? A. 2600-2700 Å B. 2700-3000 Å C. 2900-4000 Å D. 2400-2500 Å 4. The magnitude of radiation flux at any particular point of the skin depends upon the: A. Cross-sectional diameter of the
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Transformation Equations . 4. Explain relativistic length contraction and time dilation in special theory of relativity? What are proper length and proper time interval? 5. A rod has length 100 cm. When the rod is in a satellite moving with velocity 0.9 c relative to the laboratory‚ what is the length of the rod as measured by an observer (i) in the satellite‚ and (ii) in the laboratory?. 6. A clock keeps correct time. With what speed should it be moved relative to an observer so that it may
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MECHANICAL ADVANTAGE CIRCUITS SERIES CIRCUITS Ratio of resistance and effort forces Work = Force * Distance IMA= effort distance resistance distance AMA = resistance force effort force If MA > 1: Less effort force; greater effort distance If MA < 1: Greater effort force; less effort distance Moment = Force * Distance Static Equilibrium: Effort Moment = Resistance Moment Torque: A force that produces or tends to produce rotation or torsion. SIMPLE MACHINES Series
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Crans Unit 4 Assignment 2 Dr. J April 13‚ 2015 GUILLAIN-BARRE SYNDROM Guillain-Barre syndrome is a rare disorder in which your body’s immune system attacks your nerves. Instead of your immune system fighting of illnesses‚ it attacks the myelin sheath surrounding the nerves. The myelin sheath is destroyed‚ and the damage prevents the nerves from transmitting signal to the brain. It spreads very quickly and is considered a medical emergency in its most severe form. The syndrome usually begins with
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JAR 66 CATEGORY B1 engineering uk MODULE 2 PHYSICS 1 MATTER ....................................................................................... 1-1 1.1 NATURE OF MATTER.............................................................. 1-1 1.1.1 Si units ................................................................... 1-1 1.1.2 Base Units.............................................................. 1-1 1.1.3 Derived Units ........................................................
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with nervous system tissue that imitates electrical wiring. A series of photomicrographs and schematic illustrations show myelinated nerve fibers. Panel A is an illustration of a single neuron with major structures labeled. Panel B is an illustration of a cross section of a neuron that shows a myelin sheath wound around an axon. Panel C shows a cross section of a nerve stained with toluidine blue and viewed with a light
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revealing: multiple‚ more than one‚ and sclerosis‚ which refers to areas of sclerotic (scarred) tissue. Multiple sclerosis (MS) is a potentially debilitating disease in which your body ’s immune system eats away at the protective sheath that covers your nerves. MS is far more common in countries with temperate climates‚ including Europe‚ southern Canada‚ northern United States‚ New Zealand and southeastern Australia. The risk seems to increase with latitude and affects noticeably more women than
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