In connective tissue samples, which cell type would you expect to observe between parallel collagen fibers?

In connective tissue samples, which cell type would you expect to observe between parallel collagen fibers?

• A. Fibroblast
• B. Chondroblast
• C. Osteocyte
• D. Adipocyte

Answer: (A)

The key idea here is recognizing which cell types live in specific connective tissues and where they sit relative to the matrix. In dense regular connective tissue, collagen fibers are aligned in parallel to resist tension in one direction. The cells between these fibers are fibroblasts, the primary producers and maintainers of the extracellular matrix. They are typically elongated or spindle-shaped with nuclei that lie between the fibers, reflecting their role in synthesizing collagen and other matrix components. Chondroblasts are found in cartilage, osteocytes in bone, and adipocytes in adipose tissue, so they wouldn’t be located between parallel collagen bundles in this context. Fibroblasts’ position between the fibers and their function of producing matrix explain why they’re the best fit here.

The key idea here is recognizing which cell types live in specific connective tissues and where they sit relative to the matrix. In dense regular connective tissue, collagen fibers are aligned in parallel to resist tension in one direction. The cells between these fibers are fibroblasts, the primary producers and maintainers of the extracellular matrix. They are typically elongated or spindle-shaped with nuclei that lie between the fibers, reflecting their role in synthesizing collagen and other matrix components.

Chondroblasts are found in cartilage, osteocytes in bone, and adipocytes in adipose tissue, so they wouldn’t be located between parallel collagen bundles in this context. Fibroblasts’ position between the fibers and their function of producing matrix explain why they’re the best fit here.