Q. What are few examples of human cells that produce proteins for exportation? Which cytoplasmic organelle is expected to be abundant and well-developed in those cells?

Specialized cells of the glands, like the Langerhans cells of the pancreas that produce insulin or the saliva-producing cells are instances of secretory cells. In cells specialized in secretion, the endoplasmic reticulum and the Golgi apparatus are well-developed since they participate in the processing and storage of proteins for exportation.