Immunology Flashcards
Where is the site of B-cell localization and maturation?
Follicle of lymph node
Which part of the lymph node contains contain Reticular cells and Macrophages
Medulla
The region of the cortex between follicles and medulla is called
Paracortex
Where is T cells housed in the lymph node
Paracortex
Lymphatic drainage for the head and neck
Cervical Lymph node
Lymphatic drainage for the LUNGS
Hilar Lymph node
Lymphatic drainage for the Trachea and esophagus
Mediastinal Lymph Node
Lymphatic drainage for the Upper limb, breast, skin above umbilicus
Axillary Lymph node
Lymphatic drainage for the Liver, stomach, spleen, pancreas, upper duodenum
Celiac Lymph node
Lymphatic drainage for Lower duodenum, jejunum, ileum, colon to splenic flexure
Superior Mesenteric Lymph node
Lymphatic drainage for Colon from splenic flexure to upper rectum
Inferior Mesenteric Lymph Node
Lymphatic drainage for Lower rectum to anal canal (above pectinate line), bladder, vagina (middle third) cervix, prostate
Internal Iliac Lymph Node
Lymphatic drainage for Testes, Ovaries, Kidneys, Uterus
Para-aortic Lymph Node
Lymphatic drainage for Anal canal (below pectinate line), skin below umbilicus (except popliteal area), scrotum, vulva
Superficial Inguinal Lymph Node
T and B-cell activation is through
APC (antigen presenting cells)
What are the antigen presenting cells
B-cells, Dendritic cells, Langerhans cells, Macrophages
Which cells require Two signals before they can be activated
T-cells, B-cells and Class switching
Which SPECIALIZED APC cells sample antigens, processes antigens and migrates them to the draining lymph node
Dendritic Cells
What is the 1st signal in T-cell activation?
- Antigen is presented on MHC II and recognized by
TCR on Th (CD4+) cells— ( exogenous synthesized) - Endogenous or cross-presented antigen is presented
on MHC I to Tc (CD8+) cell
What is the 2nd signal in T-cell activation?
- Co-stimulatory signal via interaction of B7 protein on
dendritic cells (CD80/86) and CD28 on naive T cell.
** The cells activate and produce cytokines.
** Tc cells activate and is able to recognize and kill
virus-infected cells
What is B-cell receptor-mediated endocytosis
Foreign antigen is presented on MHC II and recognized by TCR on Th cell
Which receptor binds the CD40L on Th cell during B-cell receptor mediated endocytosis
CD40 receptor
What happens in B-cell receptor endocytosis after the binding of CD40 and CD40L
Th cell secretes cytokines that determine Ig class switching of B-cell
What determines the unique antigen-binding pocket
Fab region