ANSWERS WITH COMPLETE SOLUTIONS GRADED A++
VRG
- generates rhythm
- set at 12/min
DRG
- modifies rate & depth
PRG
- adapts breathing to special circumstances
- sleep
- exercise
- talking
- emotional responses
Central chemoreceptors
- pH in CSF
Peripheral chemoreceptor
- O2 & CO2
- carotid & arotic bodies
, Stretch receptors
- found in bronchi & bronchioles
- sensitive to lung inflation
Irritant receptors
- nerve endings in epithelial cells of airway
- sense smoke, dust, pollen, chemical fumes, cold air, mucus
- trigger bronchoconstriction, shallow breathing, breath-holding, coughing
IRDS
- infant respiratory distress syndrome
- premies lacking surfactant
- < 37 weeks
Asthma
- inflammatory disease with bronchial hyper-reactivity
- histamines & proteases released immediately
- leukotrienes & prostaglandins released after minutes
- interleukins released after hours
Inhalation therapy
- instant relief
- delivers drug directly to site of action
- little toxicity