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Questions and Answers
What is the primary role of alveoli in the respiratory system?
What is the primary role of alveoli in the respiratory system?
- To facilitate the diffusion of oxygen and carbon dioxide (correct)
- To produce mucus for airway protection
- To regulate air temperature and humidity
- To transport air from bronchioles to the trachea
What is the function of the bronchioles in the respiratory system?
What is the function of the bronchioles in the respiratory system?
- To enhance vocal resonance during speech
- To allow for gas exchange with blood capillaries
- To transport air from larger bronchi to numerous alveoli (correct)
- To filter dust and debris from inhaled air
During which process does carbon dioxide diffuse from the blood into the alveoli?
During which process does carbon dioxide diffuse from the blood into the alveoli?
- Internal respiration
- External respiration (correct)
- Pulmonary ventilation
- Cellular respiration
What is the significance of the trachea in the respiratory system?
What is the significance of the trachea in the respiratory system?
What is the composition of the alveolar surface facilitating gas exchange?
What is the composition of the alveolar surface facilitating gas exchange?
Flashcards
Alveoli
Alveoli
Tiny air sacs at the end of bronchioles where gas exchange occurs.
Bronchioles
Bronchioles
Small, branching air passages that connect the bronchi to the alveoli, delivering air to the lungs.
External Respiration
External Respiration
The process of oxygen moving from the lungs into the blood and carbon dioxide moving from the blood into the lungs.
Internal Respiration
Internal Respiration
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Trachea
Trachea
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Study Notes
External Respiration
- Oxygen-rich air enters the alveoli during inhalation.
- Oxygen diffuses across thin alveolar walls into the bloodstream, bonding to hemoglobin.
- Carbon dioxide diffuses from the blood into the alveoli.
Alveoli
- Tiny air sacs at the end of bronchioles.
- Crucial for gas exchange.
- Oxygen moves through a single layer of lung cells into the bloodstream.
- Carbon dioxide moves from the bloodstream to the alveolus.
- Approximately 300 million alveoli exist in the lungs.
Bronchioles
- Small, branching air passages in the lungs.
- Connect larger bronchi to the alveoli.
- Serve as conduits for air.
Internal Respiration
- Oxygen is delivered to body tissues.
- Carbon dioxide is removed from tissues and transported back to the lungs.
Trachea
- Wide, hollow tube connecting the larynx to the bronchi.
- Allows airflow to and from lungs.
- Prepares inhaled air to optimal temperature and humidity.
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