Golgi apparatus expands in secretory cells for mucus production

Steps:

• Golgi bodies modify and package proteins/lipids, especially glycoproteins for secretion.
• Goblet cells specialize in mucus production, demanding extensive Golgi for mucin glycosylation.
• Evaluate other cells: ciliated epithelial focus on movement, red blood cells lack organelles, smooth muscle prioritizes contraction.
• Conclude goblet cells have highest secretory load, thus most extensive Golgi.

Why B is correct:

• Goblet cells secrete mucus via mucins, which require intensive Golgi processing per cell biology definitions of secretory pathways.

Why the others are wrong:

• A: Ciliated epithelial cells emphasize ciliary motility over secretion.
• C: Mature red blood cells lack nuclei and organelles, including Golgi.
• D: Smooth muscle cells focus on contraction, with minimal secretory activity.

Final answer: B