An immune system cell called the plasma cell produces thousands of antibodies (a type of protein) per second for release into the body. what type of intracellular structure would you expect to be very prominent within the cell?

The correct answer is - rough endoplasmic reticulum.

Explanation:

Plasma cells are the cells that produce antibodies to establish the immune system in high numbers. These are the short-lived cells that has abundant rough endoplasmic reticulum in it that makes these cells well suited for producing antibodies or immunoglobulins.

The rough endoplasmic reticulum function to folds the proteins properly and sent them to the Golgi apparatus, as these cells release a high number of immunoglobulins, it is the main reason that these cells need to have more rough endoplasmic reticulum.

Thus, the correct answer is - rough endoplasmic reticulum.