The main function of serous fluid is to
lubricate and reduce friction between pleural membranes around the lung
Which bone does not contain a paranasal sinus?
Mandible
What structure connects the larynx to the primary bronchi?
Trachea
On each side of the chest, the ______ pleura lines the internal thoracic wall and the ____ pleura tightly covers the lung.
Parietal; visceral
Which statement accurately describes alveolar exchange of oxygen?
Oxygen diffuses from the alveolus to the blood because the alveolus has a higher partial pressure of oxygen.
What changes in the blood levels of respiratory gases result from hyperventilation?
Oxygen levels do not change but carbon dioxide levels fall.
Exposure to irritants causes mucus production to
increase
Into what region of the pharynx do auditory tubes open?
Nasopharynx
The amount of air that can be forcibly inhaled after a normal inspiration is the
inspiratory reserve volume
When someone exercises vigorously, their breathing is described as demonstrating
hyperpnea, involving deeper but not faster breathing
during expiration, relation of the diaphragm and external intercostals
increases the pressure in the thoracic cavity
what prevents the trachea from collapsing?
C-shaped cartilaginous rings
The exchange of oxygen and carbon dioxide between the air in the alveoli and blood in the lungs is called
external respiration
At rest, a normal person breathes about _____ times per minute.
12
What structure is also known as the "voice box"?
larynx