K-cells (Kulchitsky cells) in the tracheal epithelium are part of which system?
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Correct answer: The diffuse neuroendocrine system
K-cells are small granule cells that secrete catecholamines or hormones like serotonin. They are thought to regulate the function of other local cells and the tone of the trachealis muscle.
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More Trachea Histology questions
- The perichondrium of the tracheal rings is significant because it:
- Approximately how many C-shaped cartilaginous rings are present in the adult human trachea?
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- In a histological cross-section of the trachea, the trachealis muscle is located:
- Which component of the tracheal wall provides the 'elastic recoil' necessary for respiration?
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