Question

Complete the following paragraph by selecting the correct option for the blanks A, B, and C.
The thymus gland is located between the lungs behind the sternum on the .........A........ side of the aorta. .............B.......... secreted by the gland plays a major role in the differentiation of T-lymphocytes which provide ........C............ They also promote antibody production which provides.......D.........

• A. A: dorsal, B: Thymic humoral factor, C: humoral immunity, D: cell-mediated immunity
• B. A: ventral, B: Thymopoietin, C: humoral immunity, D: cell-mediated immunity
• C. A: ventral, B: Thymosin, C: cell-mediated immunity, D: humoral immunity
• D. A: dorsal, B: Thymic humoral factor, C: cell-mediated immunity, D: humoral immunity

Answer 1

Answer: (C)

The thymus gland is located between the lungs behind the sternum on the ventral side of the aorta. Thymosins secreted by the gland play a major role in the differentiation of T-lymphocytes which provide cell-mediated immunity. They also promote antibody production which provides humoral immunity.