1
Portage Learning Anatomy & Physiology
II: Lab 6 Exam Questions and Answers |
Latest Version | 2025/2026 | Correct & Verified
What is the primary muscle responsible for inhalation?✔✔ The diaphragm.
What happens to the diaphragm during inspiration?✔✔ It contracts and moves downward.
What is the function of the alveoli in the lungs?✔✔ They are the site of gas exchange between air and blood.
What gas diffuses from the alveoli into the pulmonary capillaries?✔✔ Oxygen.
What gas diffuses from the blood into the alveoli to be exhaled?✔✔ Carbon dioxide. 1 / 3
2
What is the role of surfactant in the lungs?✔✔ It reduces surface tension in the alveoli, preventing collapse.
What is the name of the membrane that lines the thoracic cavity?✔✔ Parietal pleura.
What is the name of the membrane that covers the surface of the lungs?✔✔ Visceral pleura.
What is the space between the two pleural layers called?✔✔ Pleural cavity.
What is the function of the pleural fluid?✔✔ It reduces friction between the pleural membranes during breathing.
What part of the respiratory system conducts air into the lungs but does not participate in gas exchange? 2 / 3
3
✔✔ The conducting zone.
What structure prevents food from entering the trachea?✔✔ The epiglottis.
What is the function of the nasal conchae?✔✔ To warm, moisten, and filter inhaled air.
What structure connects the larynx to the bronchi?✔✔ The trachea.
What is the carina?✔✔ The ridge at the base of the trachea where it splits into the two main bronchi.
What are the smallest airways in the lungs called before the alveolar ducts?✔✔ Terminal bronchioles.
What happens to thoracic volume during inspiration?
- / 3