Conducting Portion of Respiratory System

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Questions and Answers

What is the percentage of basal cells in the given content?

30% (correct)

25%

What is the function of brush cells?

Chemosensory receptors (correct)

Electroreception

Exocrine secretion

Mechanosensory receptors

What is the surface feature of brush cells?

Flagella

Cilia

Sterecilia

Microvilli (correct)

What percentage of cells are brush cells?

3% Signup and view all the answers

Where are the afferent nerve endings of brush cells located?

Basal surface Signup and view all the answers

What type of epithelium is found in the vestibular region?

Pseudostratified ciliated columnar epithelium Signup and view all the answers

What type of glands are found in the LP of the vestibular region?

Sebaceous and sweat glands Signup and view all the answers

What is found in the LP of the vestibular region, in addition to glands?

Sweat glands and vibrissa Signup and view all the answers

What is the name of the region that contains sebaceous and sweat glands?

LP Signup and view all the answers

What type of structure is found in the LP of the vestibular region, in addition to glands?

Vibrissa Signup and view all the answers

What is the primary function of the conducting portion of the respiratory system?

To provide a conduit for air to travel to and from the lungs Signup and view all the answers

What type of fibers are present in the conducting portion of the respiratory system?

Elastic and collagen fibers Signup and view all the answers

Which of the following is NOT a component of the conducting portion of the respiratory system?

Nervous tissue Signup and view all the answers

What is the main function of the terminal bronchioles in the respiratory system?

To provide a conduit for air to travel to and from the lungs Signup and view all the answers

What type of muscle is present in the conducting portion of the respiratory system?

Smooth muscle Signup and view all the answers

What is the primary function of the epiglottis?

To prevent swallowed food or fluid from entering the larynx Signup and view all the answers

What is the location of the epiglottis in relation to the larynx?

At the upper rim of the larynx Signup and view all the answers

What would happen if the epiglottis were not functioning correctly?

Food and fluid could enter the larynx Signup and view all the answers

What is the shape of the epiglottis?

Flattened Signup and view all the answers

What is the anatomical relationship between the epiglottis and the larynx?

The epiglottis projects from the larynx Signup and view all the answers

What type of epithelium covers the lower pair, also known as the true vocal cords?

Stratified squamous epithelium Signup and view all the answers

What structure supports the free edge of each vocal fold?

Vocal ligament Signup and view all the answers

What type of muscle is found in the lamina propria of the vocal folds?

Striated muscle Signup and view all the answers

How long is the trachea?

10-12 cm Signup and view all the answers

What type of glands are found in the submucosa of the trachea?

Seromucous glands Signup and view all the answers

Study Notes

Conducting Portion of Respiratory System

Serves two main functions: providing a conduit for air travel to and from the lungs, and filtering the air
Composed of cartilage, elastic and collagen fibers, and smooth muscle

Terminal Bronchioles and Trachea

Terminal bronchioles have a pseudostratified columnar epithelium
Basal cells make up 30% of cells, while brush cells (with microvilli on apical surface and afferent nerve endings on basal surface, acting as chemosensory receptors) make up 3%

Larynx

Epithelium is pseudostratified ciliated columnar
Vocal folds (true vocal cords) have:
- Stratified squamous epithelium
- Elastic fibers and vocal ligament supporting the free edge of each vocal fold
- Striated muscle (vocalis muscle in lamina propria)
- Important for phonation or sound production

Trachea

Approximately 10-12 cm in length
Composed of:
- Mucosa with respiratory epithelium and seromucous glands in lamina propria
- Submucosa with seromucous glands and 12 C-shaped rings of hyaline cartilage

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Description

Learn about the conducting portion of the respiratory system, its functions, and its components. Understand the role of cartilage, elastic and collagen fibers, and smooth muscle in the respiratory tract.