Central Control of Respiration Flashcards
What are the key regions and nerves that control breathing?
What regions in the brainstem are responsible for creating the normal pattern of regular breathing?
What does the brainstem region respond to changes in?
How does the brainstem maintain blood homeostasis?
What are the groups of neurones involved in controlling respiration in the medulla?
What group controls the pattern of breathing activated during the fight or flight response?
What type of receptor detects changes in the carbon dioxide level?
Chemoreceptors
Where are the 2 chemoreceptors involved in controlling breathing located?
What do central chemoreceptors detect?
How are the arterial blood gases maintained?
CO2 diffuses easily across the blood-brain barrier and into the CSF; however H+ and HCO3- do not, so these values are slightly reduced compared to arterial concentrations. Arterial PaCO2 is maintained tightly around 40 mmHg, in CSF PCO2 is 44 mmHg. This in turn maintains the O2 levels at optimal, allowing sufficient diffusion into the lung tissue and circulation and efficient dissociation of O2 from the haemoglobin at sites as required.
Where are peripheral chemoreceptors located?
What is information detected by carotid and aortic bodies carried by?
What do peripheral chemoreceptors carry?
What can peripheral chemoreceptors detect?
What is the partial pressure of CO2 maintained at normally?
