Thursday, December 11, 2008
Reflex Cough The Basic Receptors Of Cough Are
Reflex cough The basic receptors of cough are in a nose, To nasopharynx, throats, the top part of a trachea and the main bronchial tubes (). Other sites of receptors of cough: an ear membrane, a diaphragm, Gullet, pericardium, etc. the Centripetal nerves participating in the certificate Cough: trigeminal, glossopharyngeal, top and vagus. Efferentnye nerves: returnable guttural, vagus, a path And peripheral nerves. The cough reflex begins with a deep breath, It is accompanied by closing of a vocal crack, a relaxation of muscles of a diaphragm and Reduction of the chest and belly muscles participating in an exhalation. Thus rises intrachest and Intrapleural pressure 100-300 mm Hg and the subsequent opening Vocal crack allows to exhale sharply a stream of air with a speed 12 L/s Productive cough - "normal" The quantity at cough is not known; usually cleared through a road clearance bronchial tubes, at the healthy allocate to 1,5 Litre a day. This is swallowed imperceptibly and spontaneously through Gullet in a gastroenteric path.
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