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Questions and Answers
Which structure connects the throat to the bronchi?
Which structure connects the throat to the bronchi?
- The bronchioles
- The trachea (correct)
- The nasal cavities
- The pulmonary alveolus
What type of epithelium lines the nasal cavities?
What type of epithelium lines the nasal cavities?
- Simple cuboidal epithelium
- Stratified squamous epithelium
- Transitional epithelium
- Ciliated pseudostratified columnar epithelium (correct)
Olfactory glands in the nasal cavities secrete what type of substance?
Olfactory glands in the nasal cavities secrete what type of substance?
- Proteinaceous substance (correct)
- Mucus
- Aqueous solution
- Hormones
What do the bronchioles eventually end in?
What do the bronchioles eventually end in?
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What type of cells contain proteins that act as odorant receptors?
What type of cells contain proteins that act as odorant receptors?
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Study Notes
Lower Respiratory Tract
- The trachea connects the throat to the bronchi.
- The bronchi divide into two tubes.
- Bronchioles are smaller tubes that branch off from the bronchi and end in the pulmonary alveolus.
- The lung structure consists of the bronchial tree, which includes air tubes branching off from the bronchi into smaller and smaller air tubes, each ending in a pulmonary alveolus.
Nasal Cavities
- The nasal cavities are lined with a ciliated pseudostratified columnar epithelium.
- This epithelium contains the cell bodies of bipolar nerve (olfactory) cells that have proteins acting as odorant receptors.
Mucosa of the Nasal Cavities
- The mucosa of the nasal cavities has olfactory nerves.
- It also has olfactory glands that secrete a proteinaceous substance onto the epithelial surface.
- This secretion keeps the surface moist and provides a trap for aromatic substances.
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Description
Learn about the structures and functions of the lower respiratory tract, including the trachea, bronchi, bronchioles, and pulmonary alveolus, as well as the nasal cavities.
