Car/Pul Final Exam Word Scramble
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| Question | Answer |
| Anatomical location of Peripheral Chemoreceptors? | Aortic Arch & Carotid Sinus |
| Which nerve innervates the carotid bodies? | Glossopharyngeal (IX) |
| Which nerve innervates the aortic bodies? | Vagus (X) |
| The chemical stimuli for Peripheral Chemoreceptors? | Low O2 Tension <60 & Low pH |
| Anatomical location of Central Chemoreceptors? | Ventrolateral Surface of the medulla immersed in CSF |
| The chemical stimuli for Central Chemoreceptors? | High CO2 Tension & Low pH |
| How is ventilation effected in chronic respiratory acidosis? | 1. HCO3 increases in CSF and the central chemoreceptors are obtunded (dull). 2. Low PaO2 stimulated the peripheral chemoreceptors establishing hypoxic drive. |
| How is ventilation effected in severe metabolic acidosis (Ketoacidosis)? | H+ stimulate the central and peripheral chemoreceptors causing a Kussmaul's breathing pattern and PaCO2 drop in the 20's |
| What is the control center for ventilation? | Cerebral Cortex |
| VE Changes: PaCO2 | With normal PaO2, VE increases 3L/min for each mmHg rise in PACO2. |
| VE Changes: PaO2 | VE increases dramatically when the PaO2 falls below 60mmHg. |
| VE Changes: pH | Acute Acidosis stimulates Peripheral Chemoreceptors & VE increases. The lower the pH, the greater the VE increases. |
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Langhout1418
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