Animal Tissues: Epithelial Tissue MCQs Quiz | Class 9
Class IX Science (Code 086) – Unit II: Organization in the Living World. This quiz covers the topic “Animal Tissues: Epithelial Tissue”, focusing on the location, function, and examples of the four main types of epithelial tissues. Attempt these 10 MCQs to test your understanding, view your score instantly, and download the detailed answer key PDF for your exam preparation.
Overview of Epithelial Tissue
Epithelial tissue is the simplest protective tissue in animals. It covers most organs and cavities within the body, forming a barrier to keep different body systems separate. The cells are tightly packed with a continuous sheet and have very little intercellular space. They lie on a delicate non-cellular basement membrane.
Types of Epithelial Tissue
Based on the shape and function of the cells, epithelial tissues are classified into four main types:
- Squamous Epithelium: Consists of thin, flat, irregular cells resembling floor tiles. Found in the lining of the mouth, oesophagus, blood vessels, and lung alveoli. Functions include diffusion and filtration.
- Cuboidal Epithelium: Composed of cube-shaped cells. Found in kidney tubules and salivary glands. Its main functions are secretion, absorption, and providing mechanical support.
- Columnar Epithelium: Consists of tall, pillar-like cells. Found in the inner lining of the intestine where absorption and secretion occur.
- Ciliated Epithelium: Columnar or cuboidal cells bearing cilia (hair-like projections). Found in the respiratory tract (trachea) and fallopian tubes. The rhythmic movement of cilia helps push mucus or particles forward.
Summary Table
| Tissue Type | Cell Shape | Location | Primary Function |
|---|---|---|---|
| Simple Squamous | Flat, thin | Lung alveoli, blood vessels | Diffusion, filtration |
| Stratified Squamous | Multi-layered | Skin | Protection against wear & tear |
| Cuboidal | Cube-like | Kidney tubules, salivary ducts | Support, secretion, absorption |
| Columnar | Tall, pillar-like | Inner lining of intestine | Absorption, secretion |
Key Points for Revision
- Glandular Epithelium: Sometimes, a portion of the epithelial tissue folds inward to form a multicellular gland, which secretes substances like enzymes or sweat.
- Protective Role: Stratified squamous epithelium in the skin is arranged in many layers to prevent wear and tear.
- Permeability: The permeability of epithelial cells plays a crucial role in regulating the exchange of materials between the body and the external environment.
Extra Practice Questions
- What is the specific function of the basement membrane?
- Why is the lining of blood vessels made of simple squamous epithelium?
- Differentiate between simple and stratified epithelium.
- Name the tissue responsible for the movement of mucus in the respiratory tract.
- Where would you find glandular epithelium in the human body?
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