18 Questions
What is the primary function of the dorsal respiratory group of neurons?
To regulate respiratory rhythm and inspiration
Where is the pneumotaxic center located?
Pons
What type of receptors provide sensory inputs to the dorsal respiratory group from the liver, pancreas, and parts of the GIT?
Mechanoreceptors
What is the role of the ventral respiratory group of neurons?
To regulate expiration
What is the effect of the dorsal respiratory group on breathing rate?
It regulates respiratory rhythm
What type of neurons does the dorsal respiratory group emit?
Repetitive inspiratory neuronal action potentials
What is the primary response of the respiratory system to an increase in O2 consumption and CO2 formation during heavy exercise?
Increase in alveolar ventilation
What is the effect of sympathetic activation on respiratory muscles?
Bronchodilation and inhibited glandular secretion
What is the most common cause of sleep apnea?
Mechanical obstruction of the upper airway
What triggers the increase in ventilation during exercise?
Efferent impulses from the brain stem
What is the role of the parasympathetic nervous system in respiration?
Stimulation of bronchoconstriction and stimulated glandular secretion
What is the term for the absence of spontaneous breathing?
Apnea
What is the main function of the ventral respiratory group (VRG)?
To drive expiration by providing a strong expiratory output to the abdominal muscles
What type of receptors are responsible for preventing the lungs from overstretching?
Stretch receptors
How does the Hering-Breuer inflation reflex affect inspiration?
It switches off inspiration
What is the primary response to an increase in CO2 and H+ concentration levels in the tissues?
Increased inspiratory and expiratory motor signals to the respiratory muscles
What is the role of the dorsal respiratory group of neurons?
To receive signals from stretch receptors to prevent the lungs from overstretching
What is the effect of oxygen on the respiratory center of the brain?
Oxygen does not have a major direct effect on the respiratory center
This quiz covers the regulation of respiration, including the respiratory centre, chemical control, and peripheral chemoreceptor system. Test your knowledge of respiratory control and learn more about the respiratory system. Topics include inspiration, respiratory activity, and more.
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