lymphoid system

Question 1

contains lymphoid nodules
• thymus
• spleen
• lymphnode

Answer 1

spleen, lymphnode, tonsils, peyer’s patches : all but thymus!

Question 2

statements concerning B-lymphocytes that are true?
• plasma cells are their effector cells
• become immunocompetent in bone marrow
• abundant in 2ndary lymphoid nodules
• do not transform into memory cells

Answer 2

+++-

Question 3

statements concerning peripheral lymphoid organs that are false?
• include thymus
• all contain lymphoid nodules
• some of them are encapsulated
• all contain reticular epithelial cells

Answer 3

+ - - +

peripheral doesnt include thymus.
they DO all contain lymphoid nodules which makes the thymus the ONLY ONE that doesn’t have lymphoid nodules.
yes, spleen and LN are encapsulated.
No: only the unencapsulated lymphoid follicles don’t have reticular cells.

Question 4

statements concerning palatine tonsils that are false?
• lack secondary lymphoid nodules
• contain primary lymphoid nodules
• contain more T-lymphocyte than B-lymphocytes
• antigenprestenig cells present here
• covered by stratified squamous epithelium

Answer 4

+++–

tonsils have LB nodules so that’s secondary Lnodules. they don’t have therefore primary Lnodules.

Question 5

Cellular components of stroma of splenic lymphoid nodules?
• B-lymphocytes
• dendritic cells
• erythrocytes
• macrophages
• reticular cells
• T-lymphocytes

Answer 5

just reticular cells

Question 6

exhibits cortex and medulla
• thymus
• spleen
• lymphnode

Answer 6

not spleen: has white and red pulp instead

Question 7

Which of the following thymus cells contain tiny granules …. contain thymus hormones?
• B-lymphocytes
• epithelial reticular cells
• helper T-lymphocytes
• Langerhans cells
• mast cells
• plasma cells

Answer 7

thymus stroma has reticular cells with secretory granules

Question 8

contains cords of lymphoid tissue and lymphatic sinuses
• thymus
• spleen
• lymphnode

Answer 8

lymph node (medullary sinuses and cords)

Question 9

Statements concerning lymph nodes that are false?
• B-lymphocytes present in 2ndary lymphoid nodules
• T-Lymphocyte predominate in in paracortical region of lymphnodes
• secondary lymphnoid nodules lack macrophages
• subcapsular sinus directly connected to medullary ones
• reticular fibers present in stroma of lymphnodes

Answer 9

2ndary lymph nods lack macrophages (they DO have them)