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 asks about the locations of ciliated epithelial cells in the human body. These cells are specialized to help move particles or mucus in a specific direction through the action of their cilia. Let's analyze the options given:

1. Bile duct and Bronchioles:
   • Bile duct: The epithelial lining of the bile duct does not typically have cilia. Its primary function is to transport bile, and it relies on smooth muscle contractions rather than cilia.
   • Bronchioles: Ciliated cells are present. They help to clear mucus and debris from the airways.
2. Fallopian tubes and Pancreatic duct:
   • Fallopian tubes: These do contain ciliated epithelial cells. The cilia help in moving the egg from the ovary to the uterus.
   • Pancreatic duct: Similar to the bile duct, it does not have ciliated epithelial cells.
3. Eustachian tube and Salivary duct:
   • Eustachian tube: It is lined with ciliated cells, which help in removing debris and pathogens.
   • Salivary duct: Does not typically have ciliated epithelium.
4. Bronchioles and Fallopian tubes:
   • Bronchioles: Have ciliated epithelial cells that help in the movement of mucus out of the airways.
   • Fallopian tubes: Have ciliated cells that help in moving the egg towards the uterus.

Based on the analysis, the correct answer is the option Bronchioles and Fallopian tubes because both contain ciliated epithelial cells that function to move mucus or particles effectively in a specific direction. The other options listed have at least one component where ciliated epithelium is not present.