Chapter 23 lymph Flashcards
Lymph entering the right lymphatic duct can come from the __________.
right arm
Which of the following is a lymphatic organ?
spleen
Which is NOT a region where you would find large clusters of lymph nodes?
in the foot
What is the primary function of the lymphatic system?
to protect the body from pathogens
Which of the following is NOT considered a major component of the lymphatic system?
thymus
thyroid
adenoids
spleen
thyroid
Superficial lymphatics __________.
are found in the hypodermis, or subcutaneous layer
Lymph in the thoracic duct empties into the __________.
left subclavian vein
The right and left lumbar trunks empty into the __________.
cisterna chyli
The thoracic duct lies __________.
anterior to the vertebral bodies
Lymph leaving the lower limbs and returning to the trunk first passes through the __________.
inguinal lymph nodes
What is the function of interleukin-7 in lymphocyte formation?
It supports the differentiation of lymphoid stem cells into NK cells and B cells.
Which of the following statements about cytotoxic T cells and NK cells is true?
Both cell types develop in the bone marrow.
Both cell types produce plasma cells.
Both cell types attack abnormal cells directly.
Both cell types develop in the thymus.
Both cell types attack abnormal cells directly.
Which of the following cells directly produce and secrete antibodies?
plasma cells (plasmocytes)
Before lymph leaves a lymph node, it would encounter all of the following EXCEPT __________.
NK cells
What is the attachment point on the lymph node for blood vessels and nerves?
hilum
What is the function of the blood-thymus barrier?
to prevent premature stimulation of developing T cells
Which of the following would occur if a disease selectively destroyed the reticular cells of the thymus?
The number of B cells activated would decrease.
The spleen __________.
contains a large number of macrophages, which remove foreign materials and damaged cells from circulation.
Upon entering a lymph node, the lymph first encounters __________.
T cells
In comparison to the red pulp, the white pulp __________.
contains more lymphoid tissue
As an individual ages, which of the following does NOT happen?
The spleen becomes more fibrous and decreases in size and weight.
