Regulation of Respiration Flashcards
how are respiratory muscles similar to heart
contract rhythmically
what are differences between the heart and respiratory muscles
the respiratory muscles do not have pacemaker cells = skeletal muscle needs AP from motor neurons
how does ventilation work
it is automatic and constantly adjusted to needs
where does the rhythmic nature of the respiratory system originate
in regulatory centre of brain (medulla oblongata)
what is the respiratory center
network of synchronized neruons within the brain stem
how does the respiratory centre work
inspiratory neurons –> stimulate motor neurons in spinal cord –> contraction of respiratory muscles
what controls inspiratory neurons
another network in brainstem called Central Pattern Generator (CPG)
what is the respiratory centre under constant influence of
pO2
pCO2
H+ concentrations
what are inspiratory neurons under the influence of
stretch receptors in the lung bronchiole, and muscles
what are responsible for chemical regulation
chemorecepeters
what to chemoreceptors detect
O2
CO2
H+
what are the 2 types of chemoreceptors
central chemoreceptors
peripheral chemoreceptors
where are central chemoreceptors located
in brain stem
what do central chemoreceptors do
indirectly detect changes in pCO2 in the blood to the brain
where are peripheral chemoreceptors
carotid and aorta
