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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?

Alveolarization or secondary septation Signup and view all the answers

What is the function of type II alveolar cells?

To initiate the formation of the gas exchange interface Signup and view all the answers

What is the embryonic stage of lung development?

Weeks 4-7 Signup and view all the answers

What is the saccular stage of lung development?

Weeks 26-Birth Signup and view all the answers

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

Type I alveolar cells Signup and view all the answers

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

Canalicular stage Signup and view all the answers

What is the function of pulmonary surfactant in the lungs?

Promotes lung expansion and prevents alveolar collapse 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?

Gas exchange interface Signup and view all the answers

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

Branching morphogenesis Signup and view all the answers

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

Regulating cell proliferation and differentiation Signup and view all the answers

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