16 Questions
What is the main cause for an increase in breathing rate?
Elevated CO2 concentration in the blood
What stimulates chemoreceptors to increase breathing rate?
Large drop in O2 levels
Which process describes the movement of air in and out of the lungs?
Ventilation
What is the main reason for high altitude sickness typically starting around 8000 feet high?
Low blood O2 levels
During embryonic development, when do respiratory bronchioles start to form?
Week 16
Which blood component transports carbon dioxide mainly in the form of bicarbonate?
Plasma
What is the function of cilia in the nose?
To trap debris and pathogens
Where does the pharynx connect to both the Eustachian tubes and allow both food and air passage?
Oropharynx
Which structure is formed by the thyroid cartilage, epiglottis, and cricoid cartilage?
Larynx
What is the primary function of the alveoli?
Gas exchange
Which pressure is always lower than the intra-alveolar pressure in the lungs?
Intrapleural pressure
What causes the pressure change leading to inspiration and exhalation during breathing?
Contraction of diaphragm and intercostal muscles
What does the thoracic wall compliance refer to?
Ease of expanding thoracic wall
Which term refers to one sequence of inspiration and expiration?
Respiratory cycle
What is the amount of air entering the lungs during normal breathing referred to as?
Tidal volume
What is the primary function of anatomical dead space in the respiratory system?
Air that never reaches the alveoli for gas exchange
Learn about the functions of the nose within the respiratory system including its role as the major entrance and exit, as well as the importance of cilia in removing mucus and debris. Understand how cilia constantly beat to push unwanted particles towards the throat for swallowing.
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