Control of Breathing Flashcards
1
Q
What does the PreBotzinger Complex do? Where is it located?
A
In rostral brainstem of respiratory column (Ventral Medulla)
Inspiratory Rhythm generator
2
Q
What does the retrotrapezoid nucleus do? Where is it located?
A
On Ventral Surface of Medulla
Central Chemoreceptor (senses changes to low pH and high pCO2)
3
Q
How do Slowly adapting pulmonary stretch receptors work?
A
Respond to large lung volumes (inflation)
EXPIRATION
1. terminates inspiration and prolongs expiration
2. activates abdominal muscles for expiration
3. bronchodilation to facilitate exhale
4
Q
How do Rapidly adapting pulmonary stretch receptors work?
A
respond to changes in lung inflation (rapid large changes) and inhaled irritants INSPIRATION 1. increase inspiratory effort 2. bronchoconstriction 3. produce cough/sneeze
5
Q
How are peripheral chemoreceptors stimulated?
A
PaO2 < 60 mmHg (<90% saturation), high PaCO2, low pH, anemia
