Special Senses Project - Special Senses Project Azani Ray...

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Special Senses Project Azani Ray & Emily Albelo
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Sources ceptors/
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Introduction I Chemoreceptors sense chemical stimuli, examples being taste, smell and the osmotic pressure of the body’s extracellular fluids. Nociceptors are pain receptors. Although pain is primarily a chemical sense that detects the presence of chemicals released during tissue damage, nociceptors are typically considered in a functional category of their own. Mechanoreceptors sense physical stimuli, such as pressure and vibration, as well as the sensation of sound and pull of gravity. Thermoreceptors are specific to sensing temperature and changes in temperature. Thermoreceptors are found in two forms, those that respond most strongly to temperatures below normal body temperature (cold thermoreceptors), and those that respond most strongly at temperatures above normal body temperature (warm thermoreceptors). Photoreceptors respond to electromagnetic radiation (light) in vision.
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Introduction II Sensation is defined as the process in which a sensory receptor is stimulated, producing nerve impulses that travel to the brain, which in turn interprets such impulses as a visual image, a sound, taste, odor, touch, or pain. Perception refers to the occurrence when the brain performs organization of information it obtains from the neural impulses, and then begins the process of translation and interpretation. It is a vital process that helps us rationalize or make sense of the information related to the physical stimulus. Perception occurs when the brain processes information to give meaning to it, by means of emotions, memories, etc.
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Outer Ear Pinna: visible part of the outer ear that directs sound into the auditory canal. Auditory canal: contains special glands that secrete wax to protect the ear. Ceruminous glands: modified sweat glands in the external ear that secrete a waxy lubricating secretion. Tympanic membrane: vibrates when sound waves hit, and it separates the outer ear from the middle ear.
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Middle Ear Lateral border: made up of the tympanic membrane and the lateral wall of the epitympanic recess. Medial border: formed by the lateral wall of the internal ear. It contains a prominent bulge, produced by the facial nerve as it travels nearby. Eustachian tube: connects the middle tube to the nasopharynx and equalises pressure on both sides of the tympanic membrane.
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