Question

Question was provided via image upload.

Explanation:

Identify the cells in the diagram

The diagram illustrates the humoral immune response. The cells labeled at the bottom left with membrane-bound receptors are B cells (specifically, memory B cells or naive B cells). The cells on the right, which are larger, contain extensive rough endoplasmic reticulum, and secrete Y-shaped proteins (antibodies), are plasma cells (labeled "Plasma cells" in the box on the right).

Determine the specific question prompt

The question at the bottom reads: "1. What is the function of the cells named in the box with the..."
Based on the visible handwriting and layout, the box on the right is labeled "Plasma cells" (partially cut off as "Pla..."). The question asks for the function of these cells (plasma cells).

Explain the function of plasma cells

Plasma cells are fully differentiated B lymphocytes. Their primary function is to synthesize and secrete large quantities of soluble proteins called antibodies (immunoglobulins) into the blood and lymph. These antibodies specifically bind to the antigens that triggered the immune response, neutralizing them or marking them for destruction by other immune cells.

Answer:

The function of the plasma cells (the cells shown on the right secreting Y-shaped proteins) is to synthesize and secrete large quantities of highly specific antibodies into the bloodstream and lymphatic system to neutralize or target pathogens for destruction.