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Respiratory Physiology - Anatomy & Physiology Module 7

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Terms in this set (14)

  • When does air move into the lungs?
    Air moves into the lungs when alveolar pressure is less than atmospheric pressure.
  • When does air move out of the lungs?
    Air moves out of the lungs when alveolar pressure is greater than atmospheric pressure.
  • What pressure is always negative and helps keep the lungs inflated?
    Intrapleural pressure is always negative and helps keep the lungs inflated.
  • What is the function of goblet cells in the respiratory system?
    Goblet cells produce mucus to trap particles and protect the respiratory tract.
  • What do type II alveolar cells produce?
    Type II alveolar cells produce surfactant, which reduces surface tension in the alveoli.
  • What are the adrenergic receptors in the lungs?
    The adrenergic receptors in the lungs are beta-2 receptors.
  • What prevents food from entering the trachea when swallowing?
    The epiglottis prevents food from entering the trachea during swallowing.
  • Effect of acetylcholine on bronchioles, resistance, and airflow?
    Acetylcholine will bronchoconstrict bronchioles, increase resistance, and decrease airflow.
  • Effect of histamine on bronchioles, resistance, and airflow?
    Histamine will bronchoconstrict bronchioles, increase resistance, and decrease airflow.
  • Effect of epinephrine on bronchioles, resistance, and airflow?
    Epinephrine will bronchodilate bronchioles, decrease resistance, and increase airflow.
  • What happens to blood Pco2 and pH during hyperventilation?
    During hyperventilation, blood Pco2 decreases and pH increases.
  • What blood levels are the most important stimulus controlling ventilation?
    Carbon dioxide (Pco2) levels in the blood are the most important stimulus controlling ventilation.
  • What vibrates in the larynx to produce sound?
    The vocal cords in the larynx vibrate to produce sound.
  • What structures extend from the vocal cords to the inner wall of the larynx and do not produce sound?
    The vestibular folds extend from the vocal cords to the inner wall of the larynx and do not produce sound.