Practice Quiz - Respiratory System
  1. The stage of lung development, 6 mos. to after birth, during which the respiratory epithelium becomes squamous and the capillary loops are intimately related to the epithelium is the:
    glandular period
    vascular period
    alveolar period
    canalicular period
    acinar period
  2. In the development of the lung, which of the following is NOT correct:
    alveolar collapse in hyaline membrane disease is a result of insufficient surfactant production
    alveoli continue to form postnatally
    alveoli contain specialized epithelial cells which produce surfactant
    alveolar epithelium is derived from splanchnic mesoderm
  3. One-eighth to one-sixth of the adult number of alveoli are present in the lungs at birth. Their numbers increase after birth at least until _____ years of age.
    1
    2
    4
    6
    10
  4. Pulmonary surfactant most likely begins to form in the human fetus at about _____ weeks.
    16
    20
    28
    32
    34
  5. The terminal sac or saccular stage of lung development is characterized by the appearance of:
    secondary bronchi
    tertiary bronchi
    respiratory bronchi
    surfactant
    mature alveoli
  6. The tracheoesophageal septum separates the:
    laryngotracheal tube and nasopharynx
    esophagus and nasopharynx
    laryngotracheal tube and esophagus
    laryngotracheal tube and oropharynx
    esophagus and oropharynx
  7. The connective tissues of the lungs develop from splanchnic mesoderm.
    true
    false
  8. The laryngotracheal diverticulum develops within the floor of the pharynx between arches:
    I and II
    II and III
    III and IV
    IV and VI
    none of the above