Question 1

The narrow air passages through the nasal cavity are called&#10;A) nasal meatuses.&#10;B) external nares.&#10;C) nasal conchae.&#10;D) paranasal sinuses.&#10;E) nasal septa.

Accepted Answer

The narrow air passages through the nasal cavity are called nasal meatuses.

Question 2

Blood vessels, nerves and a main bronchus all enter each lung at the hilum.

Accepted Answer

The hilum is a region on the medial surface of each lung where blood vessels, nerves, and the main bronchus enter and exit the lung.

Question 3

In the bronchial tree, terminal bronchioles branch directly into&#10;A) alveolar sacs.&#10;B) respiratory bronchioles.&#10;C) alveoli.&#10;D) large bronchioles.&#10;E) alveolar ducts.

Accepted Answer

Terminal bronchioles branch directly into respiratory bronchioles. Alveolar sacs, alveoli, large bronchioles, and alveolar ducts are all located further down in the bronchial tree and are not directly connected to the terminal bronchioles.

Question 4

The lungs are symmetric, with each lung consisting of three lobes.

Accepted Answer

The right lung has three lobes while the left lung has two lobes. Therefore, the lungs are not symmetric.

Question 5

The exchange oxygen and carbon dioxide in the tissues is called&#10;A) tissue respiration.&#10;B) cellular respiration.&#10;C) pulmonary ventilation.&#10;D) internal respiration.&#10;E) external respiration.

Accepted Answer

The exchange of oxygen and carbon dioxide in the tissues is called internal respiration. This process occurs between the capillaries and the cells of the body, where oxygen is delivered and carbon dioxide is picked up for removal.

Question 6

The paranasal sinuses open into the nasopharynx.

Accepted Answer

The paranasal sinuses open into the nasal cavity, not directly into the nasopharynx.

Question 7

Which type of epithelial tissue contains goblet cells and cilia, and lines the wall of the trachea?&#10;A) Simple squamous epithelium&#10;B) Simple columnar&#10;C) Pseudostratified ciliated columnar epithelium&#10;D) Stratified squamous&#10;E) Simple cuboidal

Accepted Answer

Pseudostratified ciliated columnar epithelium contains goblet cells and cilia, and is found lining the wall of the trachea. Simple squamous epithelium is a single layer of flat cells and is found in areas where thin membranes are required, such as the lining of blood vessels. Simple columnar epithelium is a single layer of tall, rectangular cells and is found in areas where absorption and secretion are important, such as the lining of the small intestine. Stratified squamous epithelium is a multi-layered tissue that protects underlying tissues from abrasion and is found in areas such as the skin and lining of the mouth. Simple cuboidal epithelium is a single layer of cube-shaped cells and is found in areas where secretion and absorption are important, such as the lining of the kidney tubules.

Question 8

Which of the following is not true of the larynx?&#10;A) The glottis consists of the vocal folds and the opening between them.&#10;B) All of the air that enters the lungs must go through the larynx first.&#10;C) The thyrohyoid ligament connects the hyoid bone to the larynx.&#10;D) The vestibular folds are the only vocal cords that produce sound.&#10;E) All of these are true of the larynx.

Accepted Answer

The statement that the vestibular folds are the only vocal cords that produce sound is not true. The true statement is that the vocal folds (also known as vocal cords) are the primary source of sound production in the larynx. The vestibular folds are sometimes called false vocal cords because they do not typically produce sound, but they do play a role in protecting the vocal folds during swallowing and certain vocalizations.

Question 9

Which of the following is not true of the pleura?&#10;A) Surfactant in the pleural cavity prevents the parietal and visceral pleurae from sticking together.&#10;B) The parietal pleura covers the inner surface of the thoracic wall and the superior surface of the diaphragm.&#10;C) The pleural cavity contains serous fluid, which is a lubricant for the movements associated with breathing.&#10;D) The visceral pleura covers the outer surface of each lung.&#10;E) All of these are true of the pleura.

Accepted Answer

Surfactant is produced by cells in the alveoli of the lungs to lower surface tension and prevent lung collapse, not to prevent the parietal and visceral pleurae from sticking together. The pleural cavity indeed contains serous fluid that acts as a lubricant, but surfactant's role is specific to the alveoli and not the pleural cavity.

Question 10

The walls of alveoli and their associated capillaries both consist of simple squamous epithelium.

Accepted Answer

Both the walls of alveoli and the associated capillaries consist of simple squamous epithelium, which allows for easy gas exchange between the air and bloodstream.

Question 11

Which of the following portions of the pharynx is a passage for air only (not food)?&#10;A) Oropharynx&#10;B) Sinopharynx&#10;C) Nasopharynx&#10;D) Laryngopharynx&#10;E) None of the portions of the pharynx is a passageway for only air; all portions transport both air and food.

Accepted Answer

The answer of Which of the following portions of the...

Question 12

In the bronchial tree, the lobar bronchi branch directly into&#10;A) terminal bronchioles.&#10;B) secondary bronchi.&#10;C) primary bronchi.&#10;D) bronchioles.&#10;E) segmental bronchi.

Accepted Answer

The answer of In the bronchial tree, the lobar bronchi...

Question 13

External respiration is the same as pulmonary ventilation.

Accepted Answer

The answer of External respiration is the same as pulmonary...

Question 14

Which structure(s) of the respiratory system contain(s) C-rings or plates of hyaline cartilage, to prevent airway collapse?&#10;A) The trachea and bronchi&#10;B) The trachea, bronchi, and all of the bronchioles&#10;C) The bronchi only&#10;D) The nasal cavity&#10;E) The trachea only

Accepted Answer

The answer of Which structure(s) of the respiratory system contain(s)...

Question 15

The largest cartilage of the larynx is the&#10;A) cricoid cartilage.&#10;B) corniculate cartilage.&#10;C) epiglottic cartilage.&#10;D) arytenoid cartilage.&#10;E) thyroid cartilage.

Accepted Answer

The answer of The largest cartilage of the larynx is...

Deck 51: Respiratory Organs