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Ventilation

Normal Control of Breathing

QuestionAnswer
What 3 factors control normal breathing? 1. Forebrain Activity; 2. Inflation Reflex; 3. Chemical control
How is the Forebrain involved in normal control of breathing? repiratory INHIBITION during Swallowing, Sneezing, Talking, Crying
How is the Inflation Reflex involved in normal control of breathing? Stretch Receptors in Bronchioles INHIBIT the Inspiratory Center via Vagus Nerve Afferents
What is the significance of the Inflation Reflex? 1. prevent Excessive Inflation; 2. only significant during Exercise
What is the function of Oxygen Chemoreceptors? depolarized by LOW blood O2 - Excitatory connections to the Inspiratory Center and CVC
What is the function of Central Chemoreceptors? depolarized by HIGH H+ --> ^ CSF pH --> excites Inspiratory Center
What is the chemical formula for Central Chemoreceptors? tissues --> CO2 + H2O <--> H2CO3 <--> HCO3- + H+ --> lungs
What would be the result of an increase in breating? increase breathing --> decrease CO2 & H2O --> decrease H2CO3
What would be the result of increased CO2? ^ CO2 --> ^ H2CO3 --> ^ HCO3- + H+
Created by: Kristel