Dr.Almaslec#3 Flashcards
(30 cards)
The lymphatic system has about 600-700 lymph nodes in the human body.
True
What is the main function of lymph vessels?
To drain interstitial fluid and return it to blood
Lymph originates directly from blood plasma without any intermediate.
False
Chyle, a type of lymph formed in the digestive system, is rich in?
triglyceride
Which muscle type helps move lymph through vessels?
skeletal muscles
The lymphatic system has a central pump like the heart.
false
Which organs are classified as primary lymphoid organs?
bone marrow & thymus
What is the function of peripheral lymphoid organs?
Deliver antigen to naive lymphocytes
T cells mature in the bone marrow.
False
What structure in the thymus is an identification marker?
Hassall’s corpuscles
Where are thymic nurse cells located?
Outer cortex of thymus
What happens to the thymus with age?
involution (shrinking)
Absence of T-cells can be observed in which syndrome?”
DiGeorge’s syndrome
Secondary lymphoid organs include all except: Bone marrow / Spleen / Tonsils / MALT
Bone marrow
Where are lymphoid follicles abundant?
Lamina propria of intestine and upper airways
What does a primary follicle mainly consist of?
Resting B cells and follicular dendritic cells
Germinal centers are sites of intense T-cell activation.
False
What structure supports the filtration of antigens entering lymph nodes?
Network of lymphocytes, MQs, and dendritic cells.
Where are B cells predominantly located in lymph nodes?
Cortex
Antigens are presented to T-helper cells primarily in which region of a lymph node?
Paracortex
Which vessels bring lymph into the lymph node?
Afferent vessels
The medulla of a lymph node contains mostly active plasma cells.
True
Activated B cells move to the medulla to become plasma cells.
True
The spleen mounts immune responses primarily to lymph-borne antigens.
False
