The Lower Respiratory Tract Quiz
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Questions and Answers

Which structure is responsible for the primary gas exchange in the respiratory tract?

  • Capillaries
  • Bronchi
  • Cartilaginous rings
  • Alveoli (correct)

What is the approximate number of alveoli in our lungs?

  • 100 million
  • 300 million (correct)
  • 200 million
  • 400 million

What is the function of the bronchi?

  • Gas exchange
  • Distributing air to the lungs (correct)
  • Cleansing air
  • Warming air

What is the function of the alveoli?

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

What is the role of surfactant in the alveoli?

<p>Reducing surface tension (B)</p> Signup and view all the answers

Which structure forms the wall of the alveoli?

<p>A single layer of cells (D)</p> Signup and view all the answers

What is the barrier through which gases exchange between the alveolar air and blood capillaries called?

<p>Respiratory membrane (A)</p> Signup and view all the answers

What helps keep the alveoli open?

<p>Cartilaginous rings (B)</p> Signup and view all the answers

What is the function of mucus in the respiratory tract?

<p>Cleansing air (A)</p> Signup and view all the answers

What is the role of capillaries in the lungs?

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

Which structure holds up the main structure of the trachea?

<p>C-shaped cartilage rings (D)</p> Signup and view all the answers

What is the function of the trachea?

<p>To direct air into the lungs (B)</p> Signup and view all the answers

What is the name of the tube that extends from the larynx to the primary bronchi?

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

What is the diameter of the trachea?

<p>2.5cm (C)</p> Signup and view all the answers

Which part of the respiratory system expels mucus upward toward the pharynx?

<p>Respiratory mucosa with goblet cells (B)</p> Signup and view all the answers

How many levels of divisions are there in the bronchial tree?

<p>23 (D)</p> Signup and view all the answers

What is the main site of gas exchange in the lung?

<p>Alveolar sacs (D)</p> Signup and view all the answers

Which bronchus is slightly larger and more vertical?

<p>Right bronchus (B)</p> Signup and view all the answers

What is the last conducting portion of the respiratory system?

<p>Terminal bronchioles (C)</p> Signup and view all the answers

What is the function of the bronchi?

<p>To direct air into the lungs (D)</p> Signup and view all the answers

Which structure forms the wall of the trachea?

<p>Cartilage rings (D)</p> Signup and view all the answers

What is the function of the bronchioles?

<p>To divide into alveolar sacs (C)</p> Signup and view all the answers

What is the function of the alveoli?

<p>To facilitate gas exchange (B)</p> Signup and view all the answers

What is the role of the capillaries in the lungs?

<p>To facilitate gas exchange (C)</p> Signup and view all the answers

What is the approximate length of the trachea?

<p>11 cm (B)</p> Signup and view all the answers

What is the role of surfactant in the alveoli?

<p>To reduce surface tension (C)</p> Signup and view all the answers

What is the function of the respiratory bronchioles?

<p>To facilitate gas exchange (A)</p> Signup and view all the answers

What is the function of the goblet cells in the trachea?

<p>To expel mucus upward toward the pharynx (A)</p> Signup and view all the answers

What is the function of the primary bronchi?

<p>To direct air into and out of the lungs (D)</p> Signup and view all the answers

What is the function of the trachea?

<p>To direct air through an open passageway into and out of the lungs (A)</p> Signup and view all the answers

Which structure in the respiratory tract is responsible for efficient gas exchange due to its thin walls?

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

What is the function of the respiratory membrane?

<p>To exchange gases between the alveolar air and blood capillaries (D)</p> Signup and view all the answers

What is the purpose of surfactant in the alveoli?

<p>To reduce surface tension and prevent collapse of the alveoli (B)</p> Signup and view all the answers

What is the primary function of the bronchi?

<p>To distribute air to the lungs interior (D)</p> Signup and view all the answers

What is the approximate number of alveoli estimated to be in our lungs?

<p>300 million (C)</p> Signup and view all the answers

What is the function of the cartilaginous rings in the respiratory system?

<p>To provide structural support (A)</p> Signup and view all the answers

What is the role of the capillaries in the lungs?

<p>To facilitate gas exchange with the alveoli (D)</p> Signup and view all the answers

What is the role of mucus in the respiratory tract?

<p>To cleanse, warm, and humidify air (D)</p> Signup and view all the answers

What is the last conducting portion of the respiratory system before reaching the alveoli?

<p>Bronchioles (A)</p> Signup and view all the answers

What provides structural support to keep the alveoli open?

<p>Cartilaginous rings (C)</p> Signup and view all the answers

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