Goblets cells are:
Correct answer: A. Unicellular exocrine gland
- A. Unicellular exocrine gland
- B. Unicellular endocrine glands
- C. Multicellular exocrine gland
- D. Multicellular endocrine glands
Explanation
The most common unicellular exocrine glands are the goblet cells (mucus secreting cells) found in the epithelium of the trachea and the digestive tube.
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About Respiration
The human respiratory system includes the air passages, lungs, alveoli and breathing muscles, while gaseous exchange explains how oxygen enters blood and carbon dioxide leaves it by diffusion. The effects of smoking include damage to cilia and alveoli, reduced gas exchange, chronic bronchitis, emphysema and increased risk of lung cancer.
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