Question

Ciliated simple columnar epithelium located at: -
A. Lining of some bronchioles of the respiratory tract
B. Cover surface of ovary
C. Larger ducts of many glands
D. Ventricles of brain
Choose the most appropriate answer from the options given below:

• A. A and D only
• B. B and C only
• C. A, B, C and D
• D. B, C and D only

Hint:

Associate cilia with the movement of fluid or mucus. Key locations to remember are the respiratory tract (moving mucus), the fallopian tubes (moving the ovum), and the brain ventricles/spinal cord canal (moving cerebrospinal fluid).

Answer 1

The Correct Option is A

Step 1: Concept Overview:
Ciliated simple columnar epithelium, characterized by a single layer of tall, column-shaped cells with apical cilia, facilitates the movement of substances across its surface. The task is to identify locations where this tissue is present.

Step 2: Detailed Analysis:
- A. Bronchiole Lining (Respiratory Tract): Correct. Cilia in bronchioles form the mucociliary escalator, clearing mucus and debris.
- B. Ovary Surface: Incorrect. The ovary's surface is covered by simple cuboidal (germinal) epithelium.
- C. Large Glandular Ducts: Incorrect. Large ducts are typically lined by non-ciliated or stratified epithelium.
- D. Brain Ventricles: Correct. Ependymal cells, forming ciliated simple cuboidal to columnar epithelium, line brain ventricles and circulate cerebrospinal fluid (CSF).

Step 3: Conclusion:
Ciliated simple columnar epithelium is located in bronchioles (A) and brain ventricles (D). Hence, the correct answer is (A).