Lesson 15: 21.1-21.9
What pressures determine the direction of airflow within the respiratory tract?
intrapulmonary pressure and the atmospheric pressure
The auditory tubes open into the
nasopharynx
Each terminal bronchiole supplies air directly to
A single pulmonary lobule
How are hypoxia and anoxia different?
Hypoxia is low tissue oxygen levels; anoxia is the complete cutoff of oxygen supply.
Conducting portion
Includes the nasal cavity, and extends through the pharynx, larynx, trachea, bronchi, and larger bronchioles.
The respiratory mucosa of the conducting airways consists of
Pseudostratified columnar epithelium
The right lung has___________; the left lung has _______.
Three lobes; two lobes
The vocal ligaments are found in the
Vocal folds
Absorption of O2 from blood and release of CO2 from tissue cells is known as
internal respiration
Where does gas exchange between the air and the lungs occur?
alveoli
The opening or closing of the glottis involves rotational movement of the
arytenoid cartilages
If the fluid bond between the parietal and visceral pleura is broken and the lung collapses, the resulting condition is termed
atelectasis
mucosa consists of
both an epithelium and an underlying layer of areolar tissue
The ______ is a depression in the lung that allows attachment of the primary bronchi, pulmonary vessels, and other structures.
hilum
Respiratory portion
includes the respiratory bronchioles and alveoli
Which of the following is the best explanation for the C shape of the tracheal cartilages?
large masses of food can pass through the esophagus during swallowing
The beating of the cilia of the respiratory passages in the direction of the pharynx forms a(n)
mucus escalator
The glottis is
opening to the larynx
During a choking episode, most foreign objects are lodged in the ________ bronchus due to its larger diameter and steeper angle.
right primary
The respiratory membrane of the gas exchange surfaces consists of
simple squamous epithelium