Which of the following hormones is secreted by the anterior pituitary gland?

A. Facilitating gas exchange:Gas exchange occurs in the respiratory system (alveoli), not the lymphatic system.
B. Returning excess fluid to the bloodstream:The lymphatic system collects interstitial fluid (lymph) and returns it to the venous circulation, preventing edema.
C. Digesting proteins:Protein digestion is performed by the gastrointestinal tract and its enzymes, not the lymphatic system.
D. Producing red blood cells:Hematopoiesis (red blood cell production) occurs in bone marrow, not the lymphatic system.

A. Monocytes:Monocytes differentiate into macrophages and dendritic cells that perform phagocytosis and antigen presentation but do not produce antibodies.
B. Neutrophils:Neutrophils are short-lived phagocytic cells that ingest and destroy pathogens; they do not produce antibodies.
C. B lymphocytes:B lymphocytes (B cells) differentiate into plasma cells that secrete antibodies specific to antigens, making them the primary source of antibody production.
D. T lymphocytes:T lymphocytes are involved in cell-mediated immunity, regulating immune responses and directly killing infected cells but not in producing antibodies.