Stem Cells Utilize Multiple Processes in Tissue Repair

Steps:

• Stem cells self-renew and proliferate via mitosis to generate more cells for repair.
• They differentiate into specialized cell types to replace damaged tissue.
• Stem cells migrate to the injury site to deliver repair mechanisms.
• All three processes—proliferation, differentiation, and migration—enable comprehensive tissue regeneration.

Why A is correct:

• Stem cell definition includes asymmetric division for self-renewal (process 1), commitment to lineages (process 2), and homing to damage (process 3), as per regenerative biology principles.

Why the others are wrong:

• B excludes migration, which is vital for stem cells to reach repair sites.
• C omits proliferation, preventing sufficient cell numbers for repair.
• D excludes differentiation, blocking formation of functional tissue replacements.

Final answer: A