Regulation of Respiration in Respiratory System
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Questions and Answers

What is the primary function of the dorsal respiratory group of neurons?

  • To regulate respiratory rhythm and inspiration (correct)
  • To control expiration
  • To transmit signals to the pneumotaxic center
  • To receive sensory inputs from the peripheral chemoreceptors

    • Where is the pneumotaxic center located?

  • Medulla oblongata
  • Pons (correct)
  • Dorsal respiratory group
  • Ventral respiratory group

    • What type of receptors provide sensory inputs to the dorsal respiratory group from the liver, pancreas, and parts of the GIT?

  • Mechanoreceptors (correct)
  • Peripheral chemoreceptors
  • Baroreceptors
  • Receptors in the lungs

    • What is the role of the ventral respiratory group of neurons?

    <p>To regulate expiration</p> Signup and view all the answers

    What is the effect of the dorsal respiratory group on breathing rate?

    <p>It regulates respiratory rhythm</p> Signup and view all the answers

    What type of neurons does the dorsal respiratory group emit?

    <p>Repetitive inspiratory neuronal action potentials</p> Signup and view all the answers

    What is the primary response of the respiratory system to an increase in O2 consumption and CO2 formation during heavy exercise?

    <p>Increase in alveolar ventilation</p> Signup and view all the answers

    What is the effect of sympathetic activation on respiratory muscles?

    <p>Bronchodilation and inhibited glandular secretion</p> Signup and view all the answers

    What is the most common cause of sleep apnea?

    <p>Mechanical obstruction of the upper airway</p> Signup and view all the answers

    What triggers the increase in ventilation during exercise?

    <p>Efferent impulses from the brain stem</p> Signup and view all the answers

    What is the role of the parasympathetic nervous system in respiration?

    <p>Stimulation of bronchoconstriction and stimulated glandular secretion</p> Signup and view all the answers

    What is the term for the absence of spontaneous breathing?

    <p>Apnea</p> Signup and view all the answers

    What is the main function of the ventral respiratory group (VRG)?

    <p>To drive expiration by providing a strong expiratory output to the abdominal muscles</p> Signup and view all the answers

    What type of receptors are responsible for preventing the lungs from overstretching?

    <p>Stretch receptors</p> Signup and view all the answers

    How does the Hering-Breuer inflation reflex affect inspiration?

    <p>It switches off inspiration</p> Signup and view all the answers

    What is the primary response to an increase in CO2 and H+ concentration levels in the tissues?

    <p>Increased inspiratory and expiratory motor signals to the respiratory muscles</p> Signup and view all the answers

    What is the role of the dorsal respiratory group of neurons?

    <p>To receive signals from stretch receptors to prevent the lungs from overstretching</p> Signup and view all the answers

    What is the effect of oxygen on the respiratory center of the brain?

    <p>Oxygen does not have a major direct effect on the respiratory center</p> Signup and view all the answers

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