T OR F: Lymphocytes reside temporarily in lymphoid tissue, then move to other parts of the body.
T OR F: An infected lymph gland is called a bubo.
T OR F: The simplest lymphoid organs are the lymph nodes.
Small organs associated with lymphatic vessels are termed ________.
Lymph leaves a lymph node via ________.
efferent lymphatic vessels
What is a bubo?
an infected lymph node
Which of the following are functions of lymphoid tissue?
house and provide a proliferation site for lymphocytes; furnish an ideal surveillance vantage point for lymphocytes and macrophages
Which of the following is not a function of lymph nodes?
serve as antigen surveillance areas; produce lymphoid cells and granular WBCs; PRODUCE LYMPH FLUID AND CEREBRO-SPINAL FLUID; act as lymph filters and activate the immune system
Which of the following is a role of lymph nodes?
They filter lymph.
Which of the following is not a lymphoid tissue/organ?
Tonsils; BONE MARROW; Peyer's patches; Spleen
The ________ is (are) the most likely to become infected.
What is/are the principal lymphoid organ(s) in the body?
A mother takes her son to the doctor and describes the following symptoms that she has observed. The child is running a fever, has flu-like symptoms, and his lymph glands are very swollen and sore to the touch. Of what significance are the swollen and sore lymph glands?
It indicates that the lymph nodes are infected by microorganisms.
A nurse palpated enlarged lymph nodes. What are the signs and symptoms that help to distinguish cancerous lymph nodes from infected lymph nodes?
Tender nodes are usually due to inflammation, whereas hard, fixed nodes are suggestive of malignancy.
Why is the prognosis of cancer best when there is no detectable spread from the region of the primary tumor to the lymph nodes?
Cancer cells that break free from the primary tumor can metastasize via the lymph system. Non-metastasized cancer is easier to treat.
As infection with the human immunodeficiency virus (HIV) progresses, some individuals develop persistent generalized lymphadenopathy. Why might this occur?
The lymph nodes are overwhelmed by a large number of virus particles trapped in the nodes.
T OR F: Peyer's patches are clusters of lymphoid tissue found primarily in the large intestine.
T OR F: If even a small part of the spleen is left in a ten-year-old child, it will most likely regenerate itself.
T OR F: All lymphatic organs are composed of epithelial tissue.
T OR F: The most important role of the spleen is to provide a site for lymphocyte proliferation and immune surveillance and response.
Which of the following would not be classified as a lymphatic structure?
PANCREAS; Peyer's patches of the intestine; tonsils; spleen
The distal portion of the small intestine contains clumps of lymph follicles called ________.
The thymus is most active during ________.
What effect does age have on the size of the thymus?
The thymus initially increases in size and then decreases in size from adolescence through old age.
Which cells become immunocompetent due to thymic hormones?
Functions of the spleen include all of those below except ________.
removal of old or defective blood cells from the blood; FORMING CRYPTS THAT TRAP BACTERIA; storage of iron; storage of blood platelets
Lymphoid tissue that appears as a swelling of the mucosa in the oral cavity is called a(n) ________.
Which of the following is not a mucosa-associated lymphatic tissue?
THYMUS; tonsil; appendix; Peyer's patch
Peyer's patches are found in the ________.
Ileum of the small intestine
The thymus is the only lymphoid organ that does not:
produce hormones; have lymphocytes; have a cortex and medulla; DIRECTLY FIGHT ANTIGENS
Digestive tract-associated lymphatic tissue includes all of the following except ________.
Peyer's patches; ISLETS OF LANGERHANS; lingual tonsils; palatine tonsils
The tonsils located at the base of the tongue are the ________.
The ________ are the simplest lymphoid organs and are found at the entrance to the pharynx.
The appendix, tonsils, and Peyer's patches are examples of ________.
Tonsils have blind-ended structures called ________.
Hassall's corpuscles are always found in the lighter-colored ________ regions of the thymus.
The ________ pulp of the spleen forms cuffs around the central arteries.
Peyer's patches are located:
along the small intestine
The first lymphoid organ to appear in development is (are) the:
T OR F: Lymph arrives to the lymph nodes via efferent lymphatic vessels.
Which lymphoid organ provides a site for lymphocyte proliferation and immune surveillance and response and provides blood-cleansing functions?
Which lymphoid organ serves as the site where T lymphocytes become immunocompetent T cells?
Which of the following is/are the simplest lymphoid organ(s)?
Which of the following is NOT a part of the MALT?
appendix; tonsils; Peyer's patches; LYMPH NODES
Where are Peyer's patches located?
distal portion of the small intestine
A 46 year-old man involved in a traffic accident is rushed to the emergency room with internal bleeding. Examination reveals a ruptured spleen. As a doctor, which of the following statements are important factors for you to consider as you decide whether or not to remove the patient's spleen?
The patient could regenerate an entirely new spleen; The adrenals can take over some of the spleen's functions; The function of the spleen is not well understood; IF LEFT ALONE, THE SPLEEN CAN OFTEN REPAIR ITSELF; BONE MARROW CAN TAKE OVER SOME OF THE SPLEEN'S FUNCTIONS; The patient cannot live without a spleen; THE LIVER CAN TAKE OVER SOME OF THE SPLEEN'S FUNCTIONS
T OR F: All lymphoid organs develop from mesoderm.
T OR F: All the lymphoid organs are well developed before birth.
A sentinel node is ________.
the first node to receive lymph from an area suspected to be cancerous
T OR F: The thymus functions strictly in maturation of T cells.
collect excess fluid from interstitial spaces.
Lymphatic capillaries owe their permeability to the presence of:
minivalves in their walls.
Why would removal of lymph vessels from the right adillary region cause edema in the right arm?
Excess blood plasma builds up in regions where there are no lymph vessels.
WHich of the following represents a logical sequence of structures that contribute to the return of fluid into the blood via the lymphatic system?
Which of the following contribute(s) to the flow of lymph through lymphatic vessels?
The pumping of the heart; Pressure changes in the thorax that result from breathing
Which of the following would the body perceive as an antigen?
Bacteria, Virus, and Mismatched red blood cells
An advantage to having reticular connective tissue present in lymph nodes would be that:
The loose organization of reticular connective tissue provides niches for macrophages and lymphocytes; lymph filters through the nodes and is exposed to lymphocytes and macrophages; lymphocytes cycle to various areas of the body and back to lymph nodes
The highest density of lymph nodes can be found _____.
at the locations where lymphatic collecting vessels converge
Lymph tends to stall inside lymph nodes. This is due to:
fewer efferent lymphatic vessels than afferent lymphatic vessels
_____ can enter lymph capillaries.
Bacteria, large proteins, and interstitial fluid
The _____ is the largest lymphoid organ.
Red pulp of the spleen is most concerned with ______, while white pulp is most concerned with _____.
blood filtering; immunity
Which of the following lymphoid tissues removes defective red blood cells from the blood?
The thymus is important for:
T lymphocyte maturation.
Tonsils promote memory of pathogens by:
trapping pathogens to develop immune cells with memory.