Questions: Question 32 The antibody-secreting progeny cells of a B-cell clone are called sensitized T cells. bursa cells. antibodies. activated macrophages. plasma cells.

The answer is the last one: plasma cells.

Explanation for each option:

• Sensitized T cells: These are T cells that have been exposed to an antigen and are primed to respond to it. They are not involved in secreting antibodies.

• Bursa cells: This term is not commonly used in the context of human immunology. In birds, the bursa of Fabricius is an organ where B cells mature, but "bursa cells" is not a term used for antibody-secreting cells.

• Antibodies: These are proteins produced by B cells (specifically plasma cells) that bind to specific antigens. Antibodies themselves are not cells.

• Activated macrophages: These are immune cells that have been activated to perform functions such as phagocytosis and antigen presentation. They do not secrete antibodies.

• Plasma cells: These are the antibody-secreting progeny cells of a B-cell clone. When a B cell is activated by an antigen, it can differentiate into a plasma cell, which produces and secretes large amounts of antibodies.

In summary, the correct answer is plasma cells, as they are the cells responsible for secreting antibodies.