RESPIRATORY MUSCLES - RESPIRATORY MUSCLES Diaphragm intercostal muscles and the other accessory respiratory muscles work in co-ordination for

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RESPIRATORY MUSCLES: Diaphragm, intercostal muscles and the other accessory respiratory muscles work in co-ordination for normal breathing under central controller. There is evidence suggesting that in premature new-born babies this co-ordination is not mature enough and this could be responsible for the sudden infant death syndrome. SENSORS: 1.MECHANORECEPTORS: These receptors are placed in the walls of bronchi and bronchioles of the lung and the main function of these receptors is to prevent the overinflation of the lungs. Inflation of the lungs activates these receptors and activation of the stretch receptors in turn inhibits the neurones in inspiratory centre via vagus nerve. When the expiration starts activation of the stretch receptors gradually ceases allowing neurones in the inspiratory neurones become active again. This phenomenon is called Hering-Breuer Reflex. It is particularly important for infants. In adults it is functional only during exercise when the tidal volume is larger than normal. 2.CHEMORECEPTORS:
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This note was uploaded on 11/08/2011 for the course BIOLOGY BSC1086L taught by Professor Leostouder during the Fall '10 term at Broward College.

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RESPIRATORY MUSCLES - RESPIRATORY MUSCLES Diaphragm intercostal muscles and the other accessory respiratory muscles work in co-ordination for

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