(CNS) 1. Brain 2. Spinal Cord B. Peripheral Nervous System (PNS) 1. Nerves to parts of the body 2. Nerves from parts of the body C. Functions 1. Sensory a. receptors for stimuli (receive stimulus) b. peripheral nerves (carry impulses to CNS) c. activities monitored 1) light intensity (visual) 2) sound intensity (auditory) 3) temperature 4) oxygen concentration 5) internal fluid conditions 2. Motor a. peripheral nerves (carry impulses from CNS) b. effectors (muscles & glands) 3. Integration
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Self Depolarize and Initiate Activation Heart Purkinje Fibers – Cells Specialized for Rapid Conduction Cells in AV Node – Slow Rate of Rise and Low Amplitude à slow cell to cell spread of activation. Specialized Structures within the Heart • • • SA Node – Activation normally originates from Pacemaker Cells Localized here. Internodal and Interatrial Preferential Conduction Pathways AV Node – Site conduction delay in atrioventricular activation. Filter atrial arrythymias from ventricles. Contains
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envelope nerve fibers in PNS. produce a myelin sheath multipolar‚ bipolar‚ unipolar and anaxonic oligodendrocytes‚ ependyal cells‚ microglia and astocytes Fast anterograde and fast retrograde. Occurs at a rate of 20 to 400 mm/day Schwann cells and satellite cells. masses of rapidly dividing cells. meninges (protective membrane of CNS)‚ Metastasis from nonneuronal tumors in other organs. Often glial cells that are mitotically active throughout life spiral repeatedly around a single nerve fiber
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Once introduced in the body lead is a potent neurotoxin that interferes with brain development and slows nerve conduction velocity. Molecular targets of lead includes calcium and zinc binding proteins that control cell signalling and gene
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muscular activity. The supply of oxygen is also increased. The increased supply of oxygen necessitates an increase in the rate of respiration‚ heart beat and increased blood flow via blood vessels. When physical exercise is stopped‚ the activities of nerves‚ lungs‚ heart and kidney gradually return to their normal conditions. Thus‚ the functions of muscles‚ lungs‚ heart‚ blood vessels‚ kidney and other organs are coordinated while performing physical exercises. In our body the neural system and the
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by a restriction in the flow system Select one: a. pressure b. Flow velocity c. displacement d. flow rate 6. For Metal Production facilities‚ ….. are used Select one: a. Total Radiation Pyrometer b. both IR pyrometers and Total Radiation Pyrometer c. IR pyrometers d. None of these 7. Holding current for an SCR is best described as: Select one: a. the amount of current required to maintain conduction b. the current required before an SCR will turn-on c. the minimum current
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Collins 1 Mary Collins Johnson Anatomy Physiology Period 1 1 December‚ 2014 Lou Gehrig’s Disease Amyotrophic Lateral Sclerosis (ALS) Of all diseases‚ one of the strongest and well known as Lou Gehrig’s Disease . Lou Gehrig’s Disease ‚ also commonly known as ALS ( which stands for Amyotrophic lateral sclerosis ) ‚ is a neurodegenerative‚ meaning degrading of neurons in the brain‚ disease affecting the brain cells and spinal cord . It kills both upper and lower neurons in the motor cortex of the
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Pharmacology – NUR09100 PHARMACODYNAMICS Learning outcomes • Describe: o the structure of neurones‚ o conduction of the action potential o synaptic transmission o the principal effects of stimulation of the: sympathetic nervous system and parasympathetic nervous system • Explain and give examples of the following types of drug action: o Receptors (agonists‚ antagonists and partial agonists) o Enzyme inhibition o Membrane transport systems • Apply your knowledge to explain action and
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Nervous Tissue 3. List the types of neuroglia and cite their functions. 4. Define neuron‚ describe its important structural components‚ and relate each to a functional role. 5. Differentiate between a nerve and a tract‚ and between a nucleus and a ganglion. 6. Explain the importance of the myelin sheath and describe how it is formed in the central and peripheral nervous systems. 7. Classify neurons structurally and functionally
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THE THREE LAWS OF MOTION BY ISAAC NEWTON NEWTON’S FIRST LAW OF MOTION: INERTIA 2 Kinds of Inertia Inertia on Rest- an object will remain at rest‚ unless there is force applied to move Inertia on Motion- a moving object will continue to move unless there is force applied to stop Projectiles persevere in their motions‚ so far as they are not retarded by the resistance of the air‚ or impelled downwards by the force of gravity. A top‚ whose parts by their cohesion are perpetually drawn
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