Podcast
Questions and Answers
What structures in the respiratory system are well adapted to enable the passage of air into the lungs?
What structures in the respiratory system are well adapted to enable the passage of air into the lungs?
- Bronchi
- Bronchioles (correct)
- Trachea
- Alveoli
Which component of the respiratory system helps in preventing lung infection by moving mucus towards the throat?
Which component of the respiratory system helps in preventing lung infection by moving mucus towards the throat?
- Smooth muscle
- Elastic fibres
- Ciliated epithelium (correct)
- Goblet cells
What role does cartilage play in the respiratory system?
What role does cartilage play in the respiratory system?
- Enabling the flow of air into the lungs
- Preventing the lungs from collapsing during exhalation (correct)
- Constricting the airway to control airflow
- Secreting mucus to trap bacteria
Which part of the respiratory system contains only the larger bronchioles and is composed of smooth muscle and elastic fibres?
Which part of the respiratory system contains only the larger bronchioles and is composed of smooth muscle and elastic fibres?
During which stage of ventilation do the external intercostal muscles contract?
During which stage of ventilation do the external intercostal muscles contract?
What is the main function of smooth muscle in the respiratory system?
What is the main function of smooth muscle in the respiratory system?
Why do multicellular organisms require specialised exchange surfaces for efficient gas exchange?
Why do multicellular organisms require specialised exchange surfaces for efficient gas exchange?
What feature of an efficient exchange surface helps ensure a short distance for substances to cross?
What feature of an efficient exchange surface helps ensure a short distance for substances to cross?
Why do exchange surfaces require a good blood supply or ventilation?
Why do exchange surfaces require a good blood supply or ventilation?
What is the function of the diaphragm in the mammalian gaseous exchange system?
What is the function of the diaphragm in the mammalian gaseous exchange system?
Which structure in the mammalian gaseous exchange system helps prevent friction between the rib cage and lungs?
Which structure in the mammalian gaseous exchange system helps prevent friction between the rib cage and lungs?
In what way does a larger surface area benefit efficient gas exchange?
In what way does a larger surface area benefit efficient gas exchange?
