Deck 14: The Immune System Lymphoid Organs

Question 1

Which function is carried out by all lymphoid tissues and organs?

A) Filtration of lymph
B) Filtration of blood
C) Extramedullary hemopoiesis
D) Production of lymphocytes
E) Destruction of old erythrocytes

Answer 1

Production of lymphocytes

Question 2

Which structure is partly encapsulated and covered by nonkeratinized stratified squamous epithelium?

A) Appendix
B) Lymph node
C) Palatine tonsil
D) Peyer's patch
E) Thymic (Hassal's) corpuscle

Answer 2

Palatine tonsil

Question 3

Which cell type gives rise to both memory and effector cells and is primarily associated with humoral immunity?

A) B lymphocyte
B) NK cell
C) Macrophage
D) T lymphocyte
E) Reticular cell

Answer 3

B lymphocyte

Question 4

Recycling of iron and heme, the major complex containing iron, occurs most actively in which lymphoid organ(s)/tissue(s)?

A) Lymph nodes
B) Peyer's patches
C) Tonsils
D) Spleen
E) Lymphatic vessels

Question 5

Which description is true of all secondary (peripheral) lymphoid organs?

A) Capable of antigen-independent lymphopoiesis
B) Contain crypts
C) Contain epithelial-reticular cells
D) Lack connective tissue capsules
E) Contain lymphoid nodules

Question 6

Which structure would be most heavily labeled by an immunohistochemical method targeting the CD8 surface antigen?

A) Germinal centers
B) Paracortex
C) Peyer's patch
D) Sheathed arterioles
E) Splenic cords

Question 7

A baby is born with a cleft palate and a condition called DiGeorge syndrome, which involves failure of third and fourth pharyngeal pouch derivatives to develop properly. The palate defect is corrected surgically, but regarding the pharyngeal pouch defect the parents are advised that the growing child may expect which of the following health problems?

A) Insufficient B-cell production by lymph nodes in the head and neck
B) Inability to secrete $\operatorname{IgA}$
C) Excessive numbers of circulating but defective erythrocytes
D) Increased oral infections due lack of palatine and pharyngeal tonsils
E) Conditions related to autoimmunity

Question 8

Many immune-related cellular activities are often impaired in aged patients. Which lymphoid organ(s) normally develop less functionality and increasing amounts of adipose tissue with age?

A) Axillary lymph nodes
B) Lingual tonsils
C) Thymus
D) Splenic white pulp
E) Splenic red pulp

Question 9

A 12-year-old girl of African descent presents with anemia and a large percentage of her peripheral erythrocytes appear sickle-shaped. Genetic testing reveals homozygosity for sickle cell disease. In which of the following sites will the abnormal RBCs be removed from the circulation?

A) Thymic cortex
B) Periarteriolar lymphoid sheathes of splenic white pulp
C) Medullary sinuses of lymph nodes
D) Thymic medulla
E) Splenic cords (of Billroth)

Question 10

A 6-year-old boy is brought to the clinic where his mother reports that he was bitten by a neighbor's dog two days earlier. The child's right hand is lacerated between the thumb and index finger and this area is inflamed but healing. The doctor's examination reveals small but painless swellings beneath the skin inside the right elbow and arm pit and he explains to the mother that these are active lymph nodes enlarged in response to the infection in the hand. What has produced the swelling?

A) Increased flow of lymph through the nodes' afferent lymphatics
B) Formation of germinal centers for B-cell proliferation in each node's cortex
C) Arrival of antigen-presenting cells in each node's medulla
D) Enlargement and increased activity of the nodes' high endothelial venules
E) Increased thickness of each node's paracortex