Question

Identify the correct option with respect to the figures (a & b) given below:

• A. a : provide protection against chemical and mechanical stresses : stomach
• B. a : secrete mucus, saliva, earwax, oil, milk digestive enzymes : stomach
• C. b : found in ducts of glands : secretion and absorption
• D. b : mainly present in the inner surface of hollow organs : secretion and absorption

Answer 1

The correct option is C b : found in ducts of glands : secretion and absorption

The sketch a represents the squamous epithelium The squamous epithelium is made of a single thin layer of flattened cells with irregular boundaries. They are found in the walls of blood vessels and air sacs of lungs and are involved in functions like forming a diffusion boundary.

The sketch b represents the cuboidal epithelium. The cuboidal epithelium is composed of a single layer of cube-like cells. This is commonly found in ducts of glands and tubular parts of nephrons in kidneys and its main functions are secretion and absorption.