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Level 55

CVRR 47 Respiratory Drive


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Medulla
The part of the body that creates respiratory drive
Apnoea
The term used to describe a complete lack of breathing
Peripheral
PaO2 levels in the body are monitored by [_______] chemoreceptors
More
When PaO2 falls, peripheral chemoreceptors fire off [____] action potentials
Less
When PaO2 rises, peripheral chemoreceptors fire off [____] action potentials
8kPa
The peripheral chemoreceptors take little effect on respiratory drive until PaO2 falls below [_]kPa
PaCO2 and haemoglobin
Whilst peripheral chemoreceptors detect changes in PaO2, they do NOT detect changes in [_____] or [_____]
Peripheral
H+ levels in the body (pH) are monitored by [_______] chemoreceptors
Central
PaCO2 levels in the body are monitored largely by [_______] chemoreceptors
Increase ventilation
The respiratory compensation to a metabolic acidosis is to [______ _______]
H+ ions
Central chemoreceptors in the brain do not respond to CO2, but to [__]
Blood brain barrier
H+ ions cannot pass directly from the blood to the central (brain) chemoreceptors because the [______] is impermeable to them
Central apnoea
A type of apnoea where there is complete cessation of breathing efforts
Obstructive apnoea
A type of apnoea where there is obstruction of the upper airways
Antitussive
A term used to describe medications that suppress coughing
Alcohol, barbiturates and opiates
[_______], [______] and [______] cause a decrease in the sensitivity of respiratory centres to CO2