Respiration Tutorial

Respiration Tutorial - Respiration Tutorial Week 1...

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Respiration Tutorial Week 1
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Physiology 210 Exams Memorize normal values Memorize abnormal values Memorize lists Understand the difference between directly proportional and inversely proportional Be aware of absolute words (i.e. always and never) If it doesn’t make sense, it’s probably wrong
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An unilateral pneumothorax causes a) An increase in the residual volume b) A collapse of the chest inward c) A decrease in the intrapleural pressure d) A decrease in the recoil pressure e) Stimulation of the vagal pulmonary slowly adapting receptors *Don’t panic if you see something you don’t recognize. Use POE, move on.*
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A unilateral pneumothorax causes… a) An increase in residual volume Residual volume: Volume of air remaining in the lung after maximum expiration. Resting lung volume is below RV [Decrease]
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A unilateral pneumothorax causes… a) A collapse of the chest inward At rest, lungs want to collapse and chest wants to expand. Re: pneumothorax causes your chest to balloon out. Doesn’t make sense [outward]
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A unilateral pneumothorax causes… a) A decrease in the intrapleural pressure P pl : Pressure within the pleural space Increase: more positive, lungs collapse Decrease: more negative, lungs expand [increase]
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A unilateral pneumothorax causes… a) A decrease in the recoil pressure Recoil pressure = P L = P alv – P pl = Transpulmonary pressure = the difference between two sides of an elastic structure; Greater recoil pressure, greater lung volume Normally: ~5mmHg Pneumothorax: 0mmHg [correct] Alveoli Pleural Space 0 -10 0 0
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A unilateral pneumothorax causes… a) Stimulation of the vagal pulmonary slowly adapting receptors VPSR: discharge in response to distension [no stimulation]
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In healthy individuals… a) The anatomic dead space is greater than the physiological dead space b) Ablation of the phrenic nerve will not affect inspiration c) Contraction of the abdominal muscle is necessary to create expiration d) Alveolar ventilation and blood flow are evenly distributed
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In healthy individuals… a) The anatomical dead space is greater than the physiological dead space Physiological dead space = alveolar dead space + anatomical dead space Normally, the same because alveoli are well perfused and well ventilated. [same as]
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In healthy individuals… a) Ablation of the phrenic nerve will not affect inspiration The diaphragm is supplied by the phrenic nerve from cervical segments 3,4, and 5. [will affect]
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In healthy individuals… a) Contraction of the abdominal muscle is necessary to create expiration Expiration is passive. [not necessary]
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a) Alveolar ventilation and blood flow are evenly distributed Ventilation increases from top to bottom. Blood flow increases more rapidly.
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Respiration Tutorial - Respiration Tutorial Week 1...

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