Question

1. two well-known proteins are collagen, which resists stretching, and elastin, wh
2. the role of (click to select) is to direct the migration of cells during development.

Explanation:

Identify the biological context

Using the Extracellular Matrix knowledge point
The question asks for a component of the extracellular matrix (ECM) that is responsible for directing the migration of cells during embryonic development.

Analyze the role of fibronectin

Using the Fibronectin knowledge point
Fibronectin is a key glycoprotein of the extracellular matrix that binds to membrane-spanning receptor proteins called integrins. It plays a crucial role in cell adhesion, growth, migration, and differentiation, particularly guiding cell migration during embryonic development.

Compare with other ECM proteins

Using the Collagen and Elastin knowledge points

• Collagen provides structural support and resists stretching forces.
• Elastin provides elasticity and allows tissues to stretch and recoil.
• Fibronectin acts as an adhesive linker that guides migrating cells along pathways in the developing embryo.

Answer:

1. The role of <blank>fibronectin</blank> is to direct the migration of cells during development.