Podcast
Questions and Answers
What structures contain clusters of alveoli in the respiratory system?
What structures contain clusters of alveoli in the respiratory system?
- Alveolar ducts (correct)
- Respiratory bronchioles
- Terminal bronchioles
- Bronchi
Which type of epithelium makes up the alveolar walls in the lungs?
Which type of epithelium makes up the alveolar walls in the lungs?
- Simple squamous (correct)
- Simple cuboidal
- Stratified squamous
- Simple columnar
Where do the lungs flank the mediastinum in the thoracic cavity?
Where do the lungs flank the mediastinum in the thoracic cavity?
- Below the diaphragm
- Between the ribs
- Behind the sternum
- Superior to the clavicle (correct)
What is the function of surfactant and antimicrobial proteins secreted by alveolar cells?
What is the function of surfactant and antimicrobial proteins secreted by alveolar cells?
What is the main function of the respiratory bronchioles in the respiratory system?
What is the main function of the respiratory bronchioles in the respiratory system?
Where is the root of the lungs located with respect to the mediastinum?
Where is the root of the lungs located with respect to the mediastinum?
What is the main component of the lungs?
What is the main component of the lungs?
Which structure lines the thoracic wall and mediastinum?
Which structure lines the thoracic wall and mediastinum?
What is the role of pleural fluid?
What is the role of pleural fluid?
During inspiration, which direction do gases flow?
During inspiration, which direction do gases flow?
What is the pressure in the alveoli known as?
What is the pressure in the alveoli known as?
Why is intrapleural pressure always negative?
Why is intrapleural pressure always negative?
What does pulmonary ventilation consist of?
What does pulmonary ventilation consist of?
What leads to the flow of gases during pulmonary ventilation?
What leads to the flow of gases during pulmonary ventilation?
During inspiration, what happens when the diaphragm contracts?
During inspiration, what happens when the diaphragm contracts?
Why does air rush into the lungs during inspiration?
Why does air rush into the lungs during inspiration?
In which direction do gases move during pulmonary ventilation?
In which direction do gases move during pulmonary ventilation?
What happens to the lungs when thoracic cavity volume increases during inspiration?
What happens to the lungs when thoracic cavity volume increases during inspiration?
What is the function of the residual volume in the lungs?
What is the function of the residual volume in the lungs?
Which respiratory capacity is calculated by adding tidal volume and inspiratory reserve volume?
Which respiratory capacity is calculated by adding tidal volume and inspiratory reserve volume?
What is the average tidal volume in a typical breath?
What is the average tidal volume in a typical breath?
Which respiratory volume is the amount of air that can be forcibly expelled from the lungs?
Which respiratory volume is the amount of air that can be forcibly expelled from the lungs?
What does Vital Capacity (VC) represent?
What does Vital Capacity (VC) represent?
What does Functional Residual Capacity (FRC) consist of?
What does Functional Residual Capacity (FRC) consist of?
What does Dalton's Law of Partial Pressures state?
What does Dalton's Law of Partial Pressures state?
In the lungs, why is the partial pressure of oxygen (PO2) high in alveoli?
In the lungs, why is the partial pressure of oxygen (PO2) high in alveoli?
What happens to the partial pressure of carbon dioxide (PCO2) in pulmonary capillaries?
What happens to the partial pressure of carbon dioxide (PCO2) in pulmonary capillaries?
How do gases flow across alveolar membranes according to Dalton's Law?
How do gases flow across alveolar membranes according to Dalton's Law?
What determines the rate at which gases diffuse across alveolar membranes in the lungs?
What determines the rate at which gases diffuse across alveolar membranes in the lungs?
According to Henry's Law, what is the relationship between the amount of oxygen dissolved in the bloodstream and the partial pressure of oxygen in alveolar air?
According to Henry's Law, what is the relationship between the amount of oxygen dissolved in the bloodstream and the partial pressure of oxygen in alveolar air?
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