What tastes Good? Smell and Taste Smell Olfactory.

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    18-Jan-2016

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<ul><li><p>What tastes Good?</p><p>Smell and Taste</p><p>Smell Olfactory</p></li><li><p>The organs of taste &amp; smellSmell:Olfactory membrane:Contains over 15 million nerve cells (stimulated by odorous substances)Conditions needed for odours to be perceived:Be in a gaseous stateContain a sufficient number of odorous molecules; in high concentrationBe carried by the air to the olfactory membrane</p></li><li><p>C. Chain reaction involved in smelling:Receiver = NoseIt receives the stimuli which are odoursTransformer = Nerve cells of olfactory membraneThey transform the odours into nerve impulsesConductor = Olfactory nerveIt conducts nerve impulses from the olfactory membrane to the olfactory bulb in the brainAnalyzer = BrainIt analyses incoming nerve impulses from the olfactory nerveThe smell part of the brain is in the limbic region, and is connected to feeling and memory.</p></li><li><p>Taste (the tongue):mainly composed of muscles.covered with a mucous membrane.Small nodules of tissue (papillae) cover the upper surface of the tongue.Between the papillae are the taste buds, which provide the sense of taste. In addition to taste, the tongue functions in moving food to aid chewing and swallowing, It is also important in speech. </p></li><li><p>Taste (tongue):Taste buds or papillae (location &amp; function):Tongue is a muscular organ that contains most of the bodys taste budsConditions needed for tastes to be perceived:Be in solution in the saliva.Contain a sufficient number of flavourful moleculesCome into contact with the papillae (taste buds)Video</p></li><li><p> C. Chain reaction involved in taste:Receiver = TongueReceives the stimuli which is tastesTransformer = Taste budsTransforms tastes into nerve impulsesConductor = Gustatory nerveConducts nerve impulses to the taste center of the brainAnalyzer = BrainAnalyzed incoming nerve impulses from the gustatory nerve</p></li><li><p>D. 4 basic taste sensations:Salty, Sweet, Sour, BitterTongue to label</p><p>*The nasal cavity is the first part of the respiratory system where air enters to begin the breathing process. </p><p>The nose is the external organ of smell and sense. It is also the beginning of the air passages and the only externally visible part of the respiratory system. Recall: The nose moistens and warms the air as it enters the body, traps and filters inhaled air of foreign matter, and contains the receptors for smell. The sense of smell is primarily a function of neurvous tissues in the nasal cavity.*The tongue is mainly composed of muscles. It is covered with a mucous membrane.Small nodules of tissue (papillae) cover the upper surface of the tongue. Between the papillae are the taste buds, which provide the sense of taste. In addition to taste, the tongue functions in moving food to aid chewing and swallowing, and it is important in speech. </p><p>*The tongue is mainly composed of muscles. It is covered with a mucous membrane.Small nodules of tissue (papillae) cover the upper surface of the tongue. Between the papillae are the taste buds, which provide the sense of taste. In addition to taste, the tongue functions in moving food to aid chewing and swallowing, and it is important in speech. </p></li></ul>

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