Lecture _ 6 Control of Ventilation Fall 2007-b

Lecture _ 6 Control of Ventilation Fall 2007-b - Lecture #...

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Lecture # 6 Control of Ventilation
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Review-Oxygen Transport
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Review-Oxy-Hemoglobin Dissociation Curve
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Review-Oxy-Hemoglobin Dissociation Curve
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Review-Carbon Dioxide Transport
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1. Review 2. Control of Ventilation Central Control Sensors Effectors 1. Summary TEST: Next Wednesday October 17th Control of Ventilation
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Control of Ventilation
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Central Controller: Collection of neurons in the brainstem known as central pattern generators Sets the rhythm or rate of ventilation (in voluntary) A. Medullary Respiratory Center - Dorsal respiratory group (DRG): Primarily inspiratory, sets rhythm - Ventral respiratory group (VRG): Expiratory, quiet during resting breathing, also innervates muscles of the upper airway B. Pons - Modulate ventilatory timing Central Control of Ventilation
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Effectors
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Sensors: 1. Central Chemoreceptors 2. Peripheral Chemoreceptors 3. Lung Receptors 1. Pulmonary stretch receptors 2. Irritant receptors 3. J receptors Sensors
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Central Chemoreceptors: Located: medulla Responds to: Changes in PCO
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Lecture _ 6 Control of Ventilation Fall 2007-b - Lecture #...

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