Respiratory Development Quiz
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Questions and Answers

What is the respiratory diverticulum?

  • A type of alveolar cell responsible for gas exchange
  • A tree-like structure that develops from the foregut
  • A substance that reduces surface tension in the alveoli
  • A primary bronchial bud (correct)

What is the function of pulmonary surfactant?

  • To promote lung collapse
  • To reduce surface tension in the alveoli and prevent lung collapse (correct)
  • To initiate the formation of the gas exchange interface
  • To increase surface tension in the alveoli

What is the main site of gas exchange?

  • Type I alveolar cells (correct)
  • Septal cells
  • Primitive alveoli
  • Type II alveolar cells

What is the process called in which the number of alveoli increases dramatically?

<p>Alveolarization or secondary septation (D)</p> Signup and view all the answers

What is the function of type II alveolar cells?

<p>To initiate the formation of the gas exchange interface (C)</p> Signup and view all the answers

What is the embryonic stage of lung development?

<p>Weeks 4-7 (A)</p> Signup and view all the answers

What is the saccular stage of lung development?

<p>Weeks 26-Birth (D)</p> Signup and view all the answers

What is the main cell type responsible for gas exchange in the lungs?

<p>Type I alveolar cells (C)</p> Signup and view all the answers

During which stage of lung development does the production of pulmonary surfactant begin?

<p>Canalicular stage (B)</p> Signup and view all the answers

What is the function of pulmonary surfactant in the lungs?

<p>Promotes lung expansion and prevents alveolar collapse (B)</p> Signup and view all the answers

Which of the following is NOT a major element of the lung formed by the end of the pseudoglandular stage?

<p>Gas exchange interface (A)</p> Signup and view all the answers

What is the process called in which the bronchial tree undergoes repeated branching during lung development?

<p>Branching morphogenesis (B)</p> Signup and view all the answers

Which of the following is a role of growth factors and signaling molecules in lung development?

<p>Regulating cell proliferation and differentiation (D)</p> Signup and view all the answers

During which stage of lung development do primitive alveoli begin to form?

<p>Canalicular stage (D)</p> Signup and view all the answers

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