Question

The ciliated epithelial cells are required to move particles or mucus in a specific direction. In humans, these cells are mainly present in:

• A. Bile duct and Bronchioles
• B. Fallopian tubes and Pancreatic duct
• C. Eustachian tube and Salivary duct
• D. Bronchioles and Fallopian tubes

Answer 1

The Correct Option is D

The question pertains to the location of ciliated epithelial cells in the human body. These cells are essential for moving particles, such as mucus, in a specific direction through the action of their hair-like projections called cilia. Let's examine the options provided and determine the correct answer.

Explanation of Options:

• Bile duct and Bronchioles: While bronchioles do have ciliated epithelial cells, the bile duct does not. The bile duct is lined by simple columnar epithelium and lacks cilia since it transports bile rather than particles or mucus.
• Fallopian tubes and Pancreatic duct: The Fallopian tubes are known to have ciliated epithelium to assist in moving the egg from the ovary towards the uterus. However, the pancreatic duct does not have ciliated cells; it primarily carries digestive enzymes and is lined with simple cuboidal epithelium.
• Eustachian tube and Salivary duct: Eustachian tubes can have ciliated epithelium, but the salivary duct mostly has simple columnar or stratified columnar epithelium without cilia.
• Bronchioles and Fallopian tubes: Both bronchioles and Fallopian tubes contain ciliated epithelial cells. In the bronchioles, the cilia help move mucus and trapped particles upward to be expelled or swallowed, keeping the respiratory tract clear. In the Fallopian tubes, the movement of cilia aids in transporting eggs from the ovaries to the uterus.

Conclusion: The correct answer is Bronchioles and Fallopian tubes, as both of these locations have ciliated epithelial cells that function to move particles or cells (such as eggs or mucus) in a specific direction.