PHGY 230 Ch 23 Homework (Part 1) Exam With
Complete Solutions
Which of the following structures is not part of the respiratory zone? - ANSWER Terminal
bronchioles
Components of the respiratory mucous membrane include all of these except - ANSWER
smooth muscle
Nonkeratinized stratified squamous epithelium can be found lining what area of the
respiratory tract? - ANSWER Oropharynx
The nasal cavity is divided into left and right portions by the - ANSWER nasal septum
The largest unpaired laryngeal cartilage is the - ANSWER thyroid cartilage
The open ends of the tracheal cartilages are attached posteriorly by both the _______ and
an elastic ligamentous membrane. - ANSWER trachealis muscle
The trachea bifurcates at the level of the sternal angle (where the manubrium and body
of the sternum articulate) into the right and left - ANSWER main bronchi
The smallest respiratory bronchioles subdivide into thin airways called - ANSWER
, alveolar ducts
The right lung has ________ lobes, and the left lung has ________ lobes. - ANSWER three;
two
The pleural cavity - ANSWER is a potential space that contains a lubricating fluid that
allows the visceral and parietal pleura to slide by each other easily.
During lung inflation - ANSWER the lungs cling to the internal surface of the chest wall
as it expands.
Pulmonary ventilation (breathing) can also be described as - ANSWER the movement of
air into and out of the lungs
During inhalation, the thoracic cavity ___________; during exhalation, the thoracic cavity
___________. - ANSWER becomes larger; returns to its original size
The control of breathing muscles comes from - ANSWER nuclei in the brainstem and the
cerebral cortex
Airflow is a function of what two factors? - ANSWER pressure gradient and resistance
Physiologic dead space - ANSWER anatomic dead space + lost alveoli
Complete Solutions
Which of the following structures is not part of the respiratory zone? - ANSWER Terminal
bronchioles
Components of the respiratory mucous membrane include all of these except - ANSWER
smooth muscle
Nonkeratinized stratified squamous epithelium can be found lining what area of the
respiratory tract? - ANSWER Oropharynx
The nasal cavity is divided into left and right portions by the - ANSWER nasal septum
The largest unpaired laryngeal cartilage is the - ANSWER thyroid cartilage
The open ends of the tracheal cartilages are attached posteriorly by both the _______ and
an elastic ligamentous membrane. - ANSWER trachealis muscle
The trachea bifurcates at the level of the sternal angle (where the manubrium and body
of the sternum articulate) into the right and left - ANSWER main bronchi
The smallest respiratory bronchioles subdivide into thin airways called - ANSWER
, alveolar ducts
The right lung has ________ lobes, and the left lung has ________ lobes. - ANSWER three;
two
The pleural cavity - ANSWER is a potential space that contains a lubricating fluid that
allows the visceral and parietal pleura to slide by each other easily.
During lung inflation - ANSWER the lungs cling to the internal surface of the chest wall
as it expands.
Pulmonary ventilation (breathing) can also be described as - ANSWER the movement of
air into and out of the lungs
During inhalation, the thoracic cavity ___________; during exhalation, the thoracic cavity
___________. - ANSWER becomes larger; returns to its original size
The control of breathing muscles comes from - ANSWER nuclei in the brainstem and the
cerebral cortex
Airflow is a function of what two factors? - ANSWER pressure gradient and resistance
Physiologic dead space - ANSWER anatomic dead space + lost alveoli
