Question

Choose the incorrect statement with respect to thymus gland.

• A. Situated anterior to thyroid gland
• B. Participates in cell mediated immunity
• C. Secretes peptide hormone thymosins
• D. Begins to degenerate as the age increases

Answer 1

The correct option is A Situated anterior to thyroid gland

Thymus is bilobed gland located between lungs behind sternum on the ventral side of aorta.
• It plays a mjaor role in development of immune system.
• It is quite large at the time of birth but keeps on reducing in size with age and by the time puberty is attained it reduces to a very small size. As a result with the increase in age the immune response gradually becomes weak.
• Thymus gland secretes a peptide hormone called thymosin or thymin hormone.
• Thymus provides cell mediated immunity (cellular immunity) and also promote production of antibodies to provide humoral immunity.