Question

Name the type of epithelial tissue which forms the lining of kidney tubules and ducts of salivary glands:

• A. Cuboidal epithelium
• B. Stratified squamous epithelium
• C. Ciliated Columnar epithelium
• D. Glandular epithelium

Hint:

Ciliated columnar epithelium is characterized by tall, column-shaped cells with cilia on their free surface. It is commonly found in structures like kidney tubules and salivary gland ducts, where it helps facilitate movement of substances through ciliary action.

Answer 1

The Correct Option is C

Step 1: Understand Epithelial Tissue Types.
Epithelial tissues are classified based on their shape and arrangement. The specific type of epithelial tissue that lines kidney tubules and ducts of salivary glands is ciliated columnar epithelium. This tissue is characterized by: Columnar cells: Tall, column-shaped cells that provide a large surface area for absorption or secretion.
Cilia: Hair-like structures on the free surface of the cells that help move substances along the surface (e.g., mucus in the respiratory tract).
Step 2: Analyze Each Option.
Option (1): Cuboidal epithelium — Incorrect, as cuboidal epithelium consists of cube-shaped cells and is not typically found in kidney tubules or salivary gland ducts.
Option (2): Stratified squamous epithelium — Incorrect, as stratified squamous epithelium consists of multiple layers of flat cells and is found in areas requiring protection, such as the skin and lining of the mouth.
Option (3): Ciliated Columnar epithelium — Correct, as this is the type of epithelium found in kidney tubules and salivary gland ducts.
Option (4): Glandular epithelium — Incorrect, as glandular epithelium is specialized for secretion and does not form the lining of kidney tubules or salivary gland ducts.
Step 3: Final Answer. $$ (3) \mathbf{\text{Ciliated Columnar epithelium}} $$