20 Questions
What is the primary function of surfactant in the lungs?
Reducing the surface tension of alveolar fluid
What is the partial pressure of oxygen in the alveoli?
100 mmHg
What constitutes approximately 21% of the air we breathe?
Oxygen
What is the main factor that influences the tendency of oxygen to bind with and release from hemoglobin?
Changes in blood pH
What is the term for the collapse of the lungs away from the chest wall?
Atelectasis
What is the primary function of the respiratory system?
To facilitate the exchange of oxygen and carbon dioxide
What is the result of cellular metabolism?
Production of carbon dioxide
What is the primary transport mechanism for oxygen from the lungs to the tissues?
Oxyhemoglobin in RBCs
What systems are integrated to deliver oxygen and remove carbon dioxide?
Hematologic, cardiovascular, and respiratory systems
What is affected when the respiratory system is impaired?
Our ability to breathe, transport gases, and participate in everyday activities
What is the function of the lymphoid tissue in the nasopharynx and oropharynx?
To trap and destroy pathogens entering with the air
What is the purpose of the pleural fluid?
To lubricate the movement of the lungs during inhalation
Where does gas exchange occur in the respiratory system?
In the respiratory bronchioles and alveoli
What structure is commonly referred to as the Adam's apple?
Larynx
What is the function of the upper respiratory system?
To filter, warm, and humidify the air we breathe
What is the primary cause of impaired drive to breathe?
Severe head injury
What is the term for the expansion and recoil of the lungs in response to pressure changes?
Passive ventilation
What is the volume of air inspired and expired with each breath in adults?
500 mL
What is the term for the stretchability of lung tissue?
Lung compliance
What muscles are involved in assisting respiration during strenuous exercise or certain heart diseases?
Accessory muscles of respiration
Learn about the upper and lower respiratory systems, including the mouth, nose, pharynx, larynx, trachea, lungs, bronchi, bronchioles, alveoli, and pulmonary capillary network.
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