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16 Cards in this Set
- Front
- Back
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The dorsal aspect of the medulla oblongata is responsible for what?
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Inspiration
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The ventral aspect of the medulla oblongata is responsible for what?
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Expiration
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The apneustic center of the pons acts on what?
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DRG -> inspiration
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THe pneumotaxic center of the pons does what?
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Increase tidal volume
Decreaes respiratory rate |
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Factors that increase ventilation
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High PaCO2
Low PaO2 Low PH |
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The rate and depth (tidal volume) of breathing are controlled to maintain the PaCO2 close to ____ mmHg
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40
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The central chemoreceptors are sensitive to changes in:
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CSF [H+]
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Where are peripheral chemoreceptors located?
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Carotid bodies
Aortic bodies |
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Glomus cells in the carotid and aortic bodies are sensitive to what?
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Changes in:
PaO2 PaCO2 arterial pH |
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Other airway receptors
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Stretch receptors
Irritant receptors J-receptors (juxtapulmonary-capillary receptors) |
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Irritant receptors sent afferent signals via which nerves?
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Vagus
Trigeminal Olfactory |
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Normal values for PaO2, PaCO2, and arterial [HCO3-]
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PaO2 = 100mmHg
PaCO2 = 40 mmHg [HCO3-] = 24 mEq/L |
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Consequences of acidosis
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Arrhythmias
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Consequences of alkalosis
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Seizures
Vascular collapse |
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pK of the bicarbonate buffer system
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6.1
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Primary regulator of [HCO3-]
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Kidney
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