Which component of connective tissue provides scaffolding and mediates cell-matrix signaling?

Which component of connective tissue provides scaffolding and mediates cell-matrix signaling?

• A. Elastin
• B. Fibronectin
• C. Collagen
• D. Proteoglycan

Answer: (C)

Collagen forms the main structural network in connective tissue, providing the scaffold that supports tissues and creates the framework cells attach to. This fibrous matrix gives tensile strength and, through interactions with cell-surface receptors, enables cell–matrix signaling that guides behavior such as attachment, migration, and differentiation. Elastin provides elasticity rather than a rigid scaffold; proteoglycans contribute a hydrated gel that resists compression; fibronectin aids cell adhesion and signaling but is not the primary structural framework itself.

Collagen forms the main structural network in connective tissue, providing the scaffold that supports tissues and creates the framework cells attach to. This fibrous matrix gives tensile strength and, through interactions with cell-surface receptors, enables cell–matrix signaling that guides behavior such as attachment, migration, and differentiation. Elastin provides elasticity rather than a rigid scaffold; proteoglycans contribute a hydrated gel that resists compression; fibronectin aids cell adhesion and signaling but is not the primary structural framework itself.