Which cell secretes extracellular matrix during cartilage formation?

Which cell secretes extracellular matrix during cartilage formation?

• A. Chondrocyte
• B. Chondroblast
• C. Fibroblast
• D. Chondroblasts

Answer: (D)

Cartilage formation is driven by chondroblasts. These immature cartilage cells are the ones that synthesize and secrete the extracellular matrix, laying down the collagen and proteoglycans that form the cartilage scaffold. As they secrete matrix, they become enclosed in lacunae and mature into chondrocytes, which then maintain the matrix rather than actively producing it. The other options don’t fit this role: chondrocytes are the mature cells in cartilage, fibroblasts belong to other connective tissues, and the term chondroblast (singular) is simply a different form of the same cell, but the standard description of the secreting cell during cartilage formation is chondroblasts.

Cartilage formation is driven by chondroblasts. These immature cartilage cells are the ones that synthesize and secrete the extracellular matrix, laying down the collagen and proteoglycans that form the cartilage scaffold. As they secrete matrix, they become enclosed in lacunae and mature into chondrocytes, which then maintain the matrix rather than actively producing it. The other options don’t fit this role: chondrocytes are the mature cells in cartilage, fibroblasts belong to other connective tissues, and the term chondroblast (singular) is simply a different form of the same cell, but the standard description of the secreting cell during cartilage formation is chondroblasts.