Section 5.1 Quiz

* not completed

. Where do the main events leading to the development of circulating T cells occur?

Lymph nodes correct incorrect

Thymus correct incorrect

Bone marrow correct incorrect

Spleen correct incorrect

* not completed

. Undifferentiated lymphocyte precursor cells migrate from the bone marrow and blood to the _____, where T cells develop and mature.

thymus correct incorrect

epitope correct incorrect

spleen correct incorrect

thyroid correct incorrect

* not completed

. Which of the following cells present self-antigens to developing thymocytes to test the functionality of the T-cell receptor and to define tolerance to self-molecules?

Macrophages correct incorrect

Intraepithelial lymphocytes correct incorrect

Hassall’s corpuscles correct incorrect

Dendritic cells correct incorrect

* not completed

. Identify a true statement about thymus involution.

It takes place at a rate of approximately 3% per year till the age of 35–45. correct incorrect

It begins after the age of 35. correct incorrect

At middle age, the rate of thymus involution becomes 6% per year. correct incorrect

At middle age, thymic cells are no longer present in the body. correct incorrect

* not completed

. Describe the roles of the thymus in T-cell development.

Hassall’s corpuscles correct incorrect

Peyer's patches correct incorrect

cytokines correct incorrect

plasma cells correct incorrect