Respiratory System Flashcards
Which of the following best describes the mechanical process of normal breathing during expiration?
The diaphragm relaxes and moves upward, while the intercostal muscles relax and move the ribs downward.
Which of the following describes the volume of air associated with a normal breath?
Tidal volume.
Which of the following conditions would exhibit an increase in lung compliance?
Emphysema.
What is the correct sequence in which inhaled air passes through the respiratory tract?
Nasal cavity
Pharynx
Larynx
Trachea
Bronchi
Bronchioles
______________ is the exchange of oxygen and carbon dioxide across the alveolar membrane.
Diffusion
Which of the following terms correctly describes the movement of air in and out of the lungs?
Ventilation.
Voluntarily holding your breath will eventually result in:
an innate reflex to start breathing due to increased carbon dioxide levels.
A lung with a low level of compliance could be best described as _____________.
a stiff lung requiring extra work to accomplish normal breathing.
Which of the following is happening during a contraction of the diaphragm?
A decrease in alveolar pressure.
The ______________ is a double layered membrane that lines the lungs.
pleura
Which of the following lists the respiratory passageways in order from largest diameter to smallest diameter?
Trachea, bronchi, bronchioles.
Which of the following terms is alternatively called the “voice box”?
Larynx.
Gas exchange between the blood and alveoli would be enhanced by ______________, but impeded by __________________.
increased alveolar surface area; increased membrane thickness.
In the respiratory system, the majority of gas exchange takes place ___________________.
in the alveoli
Which of the following substances is produced by the lung for the purpose of reducing surface tension?
Surfactant.
