Which cell type is primarily responsible for the production of antibodies in the immune system?

A. B cells:B cells, upon activation, differentiate into plasma cells that synthesize and secrete antibodies that target specific antigens.
B. Macrophages:Macrophages perform phagocytosis and antigen presentation to T cells but do not produce antibodies.
C. T helper cells:T helper cells coordinate the immune response by stimulating B cells and cytotoxic T cells but are not antibody-producing cells themselves.
D. Neutrophils:Neutrophils are first responders in inflammation and bacterial infection but play no role in antibody production.

A. Plasma proteins:Plasma contains clotting (coagulation) proteins such as fibrinogen and other clotting factors that are essential to the coagulation cascade, but they require cellular elements to form a stable clot.
B. Red blood cells:Red blood cells are not responsible for initiating clot formation; they become trapped in the fibrin mesh of a clot but do not drive clotting.
C. Platelets:Platelets (thrombocytes) adhere to damaged endothelium, aggregate, and provide a phospholipid surface for coagulation enzyme complexes, playing a primary role in clot formation.
D. White blood cells:White blood cells participate in immune responses and inflammation but are not the primary cellular drivers of clot formation.