Goblet 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 goblet cells are unicellular exocrine gland. Goblet cells are scattered in the epithelial linings of the intestinal and respiratory tracts. They secrete mucin and create a protective mucus layer.
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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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