Which is the predominant cell type in the growing cartilage?

Correct option is D

Chondroblasts are the predominant cell type in growing cartilage. These cells are responsible for producing and maintaining the cartilaginous matrix, which consists of collagen and proteoglycans.
Key Characteristics of Chondroblasts: 1. Role in Growth:
· Active during the growth phase of cartilage, particularly in the epiphyseal plates of growing bones.
2. Matrix Production:
· Synthesize extracellular matrix components, including collagen and glycosaminoglycans.
3. Location:
· Found near the perichondrium (outer layer of cartilage).
4. Transformation:
· Once embedded in the matrix, chondroblasts mature into chondrocytes, which maintain the cartilage.
Explanation of Other Options: · (a) Peritoneusblasts:
· No such cell type exists in histology.
· (b) Merocrine:
· Refers to a type of exocrine gland secretion (e.g., sweat glands), not a cartilage-related cell.
· (c) Mesothelium:
· A type of epithelial tissue lining body cavities, not related to cartilage.
Correct Answer: (d) Chondroblasts Information Booster 1. Types of Cartilage:
· Hyaline Cartilage: Found in joints, ribs, and the nose.
· Elastic Cartilage: Found in the ear and epiglottis.
· Fibrocartilage: Found in intervertebral discs and pubic symphysis.
2. Cartilage Growth:
· Appositional Growth: Involves chondroblasts adding new layers to the surface.
· Interstitial Growth: Involves division of chondrocytes within the matrix.
3. Cartilage vs. Bone:
· Unlike bone, cartilage is avascular and relies on diffusion for nutrient supply.