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