Respiration- control of breathing Flashcards
What do the neural signals from chemoreceptors do?
Provide feedback on blood PO2, PCO2 and pH.
What do neural signals from mechanoreceptors do?
provide feedback on mechanical
status of lungs, chest wall and airways.
What do neural signals sent to respiratory muscles do?
Produce rhythmic breathing
movements, e.g., diaphragm and intercostals
What do neural signals sent to upper airway muscles do?
control laryngeal, pharyngeal and
tongue
What are chemoreceptors?
Sensory receptors that detect
chemical changes in the surrounding environment.
What is meant by hypercapnia?
Increase in CO2
What is meant by hypoxia?
Decrease in O2
Where would you find peripheral chemoreceptors?
Aortic arch and carotid sinuses
What are baroceptors important for?
Detect pressure chnages
What nerve is associated with the carotid sinuses?
Glossopharyngeal nerve IX
What to peripheral chemoreceptors respond to?
Decrease in PO2 (hypoxia)
Where does hypoxic response originate from?
Carotid and aortic bodies
What makes up the brainstem?
Pons and medulla
What molecule drives your moment to moment breathing?
CO2
Where do hypercapnic responses originate from?
Central chemoreceptors in brain stem
