is a normal concomitant of aging and is distinct from hearing losses caused by noise exposure‚ toxins or disease agents. A sensorineural hearing loss is one resulting from dysfunction of the inner ear‚ the cochlea‚ the nerve that transmits the impulses from the cochlea to the hearing center in the brain or damage in the brain. The most common reason for sensorineural hearing impairment is damage to the hair cells in the cochlea. As one grows older‚ the hair cells degenerate and lose their function
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Body Systems Cardiovascular System - relates to the heart‚ blood vessels and circulation in the body. The cardiovascular system‚ also known as the circulatory system‚ refers to the network that transports blood throughout the body. It is composed of the heart‚ blood vessels‚ and blood. There are actually two circulatory systems: * The pulmonary circulation – sends blood from the heart to the lungs. * The systemic circulation – sends blood from the heart to all the other parts of our
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Homeostasis http://physicianjobster.com/wp-content/uploads/2010/01/Homeostasis-Diagram-of-Insulin-and-Glucagon-in-Controlling-Blood-Glucose.jpg Topic 6 Homeostasis and negative feedback At the end of this topic you should be able to : Define homeostasis Explain why homeostasis is important in living organisms Explain the importance of a constant core temperature in relation to enzyme activity Explain the importance of maintaining constant blood pH in relation to enzyme activity
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Energy Transformation Conduction‚ convection‚ and radiation are things that exist in our life. Thanks to that stuff we have things like electricity and things to cook too. I am going to explain things about energy transformation. Heat transfer is the way heat moves through matter to change the temperature of other objects. There are three types of heat transfers‚ Conduction‚ Convection‚ and Radiation. The first kind of heat transfer‚ conduction‚ is heat transferring through direct contact of materials
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Heat Transfer Rate Processes Mode Conduction Convection Radiation Transfer Mechanism Diffusion of energy due to random molecular motion Diffusion of energy due to random molecular motion plus bulk motion Energy transfer by electromagnetic waves Rate of heat transfer (W) q = - kA dT dx q = h A(Ts-T∞) q = σ ε A(Ts4-Tsur4) By Mr. Amjed Ahmed Ali Syllabus of Heat Transfer (English)‚ (2 hours/ week‚ Applied 2 hours /week) 1.Heat transfer by conduction‚ convection and radiation 2.One-dimensional
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3.1 CATHODE RAYS 3.1.1 Explain that cathode ray tubes allowed the manipulation of a stream of charged particles. DEFINITTIONS: * Cathode Ray Tube: is an evacuated tube which allows the unobstructed movement of cathode rays from a cathode to an anode. * Cathode Ray: Are negatively charged particles and can therefore be deflected. * This can be shown by 3 facts: * They leave –ve charge on the surfaces they strike * They are deflected by magnetic fields as predicted
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with a tube.1‚2 Golgi also theorized that the that the nerve impulses were able to travel in any direction.2 The supporters of the neuron
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The axons are | |processes of pyramidal cells in the cerebral cortex‚ and they carry information‚ in the form of patterns of nerve | |impulses‚ from cells of one hemisphere to cells in the contralateral hemisphere. The cell bodies of the axons in the | |corpus callosum are found mostly in the second and third layers (the Outer Granular Layer and the Outer Pyramidal Layer‚ | |respectively)
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which coordinate their activities to form a specific function. Conducting tissues of plants are complex permanent tissues. They are of two types‚ xylem and phloem.Xylem Xylem is a chief‚ conducting tissue of vascular plants. It is responsible for conduction of water and mineral ions.Xylem is a very important plant tissue as it is part of the ‘plumbing’ of a plant. It carries water and dissolved substances throughout and consists of a combination of parenchyma cells‚ fibers‚ vessels‚ tracheids and ray
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Anatomy 1 Lab FINAL EXAM ** Covers exercises 13‚ 14‚ 15‚ 16‚ 17‚ 18‚ 20‚ 21‚ 22‚ 23‚ 24‚ 25‚ 26‚ 27** Terms – Intro to Sensory Receptors (Lab 24) General senses – touch‚ pressure‚ changes in temperature‚ pain‚ blood pressure and stretching Special senses – taste‚ smell‚ sight‚ hearing‚ balance Punctate distribution – uneven distribution of sense receptors Stimuli are classified by type (modalities) such as light‚ heat‚ sound‚ pressure and specific chemicals Receptors – receiving units in
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