Section 2: The Lymphoid System

Question 1

The key cell involved in the immune response is the

Answer 1

lymphocyte

Question 2

Lymphocytes circulating white blood cells in the peripheral blood

Answer 2

20-40%

Question 3

Size of small lymphocyte

Answer 3

7-10um

Question 4

All lymphocytes arise from pluripotential hematopoietic stem cells located in

Answer 4

Bone Marrow

Question 5

Total weight of Bone Marrow in adult

Answer 5

1300-1500g

Question 6

Most authorities agree that T, B, and NK cells arise from a common precursor known as the

Answer 6

common lymphoid precursor

Question 7

Total average weight of thymus at birth

Answer 7

30g

Question 8

Mature T lymphocytes are then released from the

Answer 8

Medulla

Question 9

What is the largest secondary lymphoid organ?

Answer 9

Spleen

Question 10

located along lymphatic ducts and serve as central collecting points for lymph fluid from adjacent tissues.

Answer 10

Lymph nodes

Question 11

Filtration is a main function of these organs.

Answer 11

Lymph nodes

Question 12

Which of the following is a primary lymphoid organ?

a. Lymph node
b. Spleen
c. Thymus
d. MALT

Answer 12

c