Which statement about anchoring junctions is true?

• A. They include Zonula Adherens and Macula Adherens
• B. They are identical to tight junctions
• C. They form diffusion barriers
• D. They are only present in connective tissue

Answer: (A)

Anchoring junctions provide mechanical stability by linking neighboring cells and connecting their cytoskeletons. Two main types fit this role: Zonula adherens, which form a continuous belt around each cell just below tight junctions and connect to actin filaments through cadherin proteins, and Macula adherens (desmosomes), which are spot-like junctions that attach to intermediate filaments and distribute tensile stress across the tissue. Because these junctions work together to hold cells in a cohesive, resilient sheet, it’s correct to say that anchoring junctions include both Zonula Adherens and Macula Adherens. They are not diffusion barriers (that’s the function of tight junctions), they are not identical to tight junctions, and they are not restricted to connective tissue—epithelial tissues, and even heart muscle with desmosomes, rely on these junctions for strength.