> Which ONE of the following statements about the **upper respiratory** tract is INCORRECT? > 1. Mucus is secreted from the submucosal glands upon parasympathetic stimulation, and provides a housekeeping function for routine protection of the airways 2. **Nasal decongestants such as oxymetazoline act by binding to both α1 and α2 receptors on venules 小静脉…** 3. Symptoms of acute sinusitis include headache, pain and nasal congestion 4. Mucus is produced in the sinuses and nasal cavity but not in the bronchi
Question
Which ONE of the following statements about the upper respiratory tract is INCORRECT?
- Mucus is secreted from the submucosal glands upon parasympathetic stimulation, and provides a housekeeping function for routine protection of the airways
- Nasal decongestants such as oxymetazoline act by binding to both α1 and α2 receptors on venules 小静脉…
- Symptoms of acute sinusitis include headache, pain and nasal congestion
- Mucus is produced in the sinuses and nasal cavity but not in the bronchi
Solution
The incorrect statement is:
- Mucus is produced in the sinuses and nasal cavity but not in the bronchi.
This statement is incorrect because mucus is indeed produced in the bronchi. The bronchi, like other parts of the respiratory tract, are lined with mucus-producing cells known as goblet cells. This mucus plays a crucial role in trapping dust, bacteria, and other particles that are inhaled, preventing them from reaching the lungs.
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