Respiratory System Overview

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What are the cellular sites of the exchange of O2 and CO2 between inspired air and blood?

Alveoli (correct)

Bronchi

Pharynx

Trachea

Which part of the respiratory system provides conduits for air movement to and from alveoli?

Larynx

Pharynx

Nasal cavities

Bronchioles (correct)

What provides the conducting portion of the respiratory system with rigid structural support and necessary flexibility?

Cartilage, collagen, and elastic fibers (correct)

Diaphragm

Alveoli

Smooth muscle

What is the main function of the respiratory portion of the respiratory system?

Gas exchange Signup and view all the answers

Which part of the respiratory system consists of the nasal cavities, pharynx, larynx, trachea, bronchi, bronchioles, and terminal bronchioles?

Conducting portion Signup and view all the answers

What is included in the ventilating mechanism of the respiratory system?

Thoracic cage, intercostal muscles, diaphragm, and elastic components of lung tissue Signup and view all the answers

Which type of epithelium lines the middle and inferior conchae in the nasal cavities?

Respiratory epithelium Signup and view all the answers

What is the function of the thin mucus layer produced by seromucous glands and goblet cells in the nasal cavities?

To trap air impurities and remove them Signup and view all the answers

What is the role of the bony shelflike projections called conchae in the nasal cavities?

To increase surface area for conditioning inhaled air Signup and view all the answers

What is the main function of the sweat glands, sebaceous glands, and vibrissae in the nasal vestibule?

To filter out particulate material from the air Signup and view all the answers

What is the type of epithelium that covers the roof of the nasal cavities and the superior conchae?

Olfactory epithelium Signup and view all the answers

In which part of the nasal cavities is the epithelium keratinized?

Vestibule Signup and view all the answers

What is the main function of ciliated columnar cells in the respiratory epithelium of the nasal cavities?

To move mucus and trapped particles toward the throat Signup and view all the answers

What is the function of immunoglobulin A (IgA) in the secretions of the nasal cavities?

To provide protection against pathogens Signup and view all the answers

Respiratory System Overview

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