16 Questions
What is the main cause for an increase in breathing rate?
Elevated CO2 concentration in the blood
What stimulates an increase in breathing rate during strenuous exercise?
Excess lactate production
In which scenario is a large drop in O2 needed to stimulate chemoreceptors and increase breathing?
At high altitudes
What defines the saturation rate concerning hemoglobin?
How many hemoglobin are filled with O2
What is a characteristic of fetal blood's hemoglobin?
Higher affinity for O2 than adult hemoglobin
What is one effect of lower pH on hemoglobin regarding oxygen dissociation?
Reduced O2 dissociation from hemoglobin
What is the main function of the cilia in the nose?
To push mucus and debris towards the throat
Where does the laryngopharynx split into?
Larynx anteriorly and esophagus posteriorly
What is the function of the epiglottis?
To close off the trachea during swallowing
Which structure marks the beginning of the respiratory zone?
Respiratory bronchiole
What is the primary function of alveolar macrophages?
To protect against pathogens and debris
Which factor is responsible for causing lung contraction during breathing?
Intra-alveolar pressure exceeding intrapleural pressure
What does thoracic wall compliance refer to in relation to breathing?
Ease of expanding the thoracic wall during breathing
What is tidal volume in relation to pulmonary ventilation?
Volume of air entering lungs during normal breathing
What defines inspiratory reserve volume in the respiratory system?
Amount of air beyond tidal inspiration that can be forcefully inhaled
What describes the functional residual capacity in terms of lung function?
Amount of air left after tidal expiration
Learn about the structure and functions of the nose and nasal cavity as part of the respiratory system. Explore how the nose filters, warms, and humidifies incoming air, as well as the role of cilia in removing debris. Understand the importance of the nose as the major entrance and exit for the respiratory system.
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