chapter 20 lymphatic system and lymphatic organs Flashcards
A major function of the lymphatic system is __________.
a) circulation of blood
b) distribution of nutrients
c) return of tissue fluid to the cardiovascular system
d) gas distribution
Aggregates of lymphoid nodules located in the wall of the ileum of the small intestine are __________.
a) Werner's nodes
b) ileal tonsils
d) Peyer's patches
e) submucosal tonsils
Collections of lymphoid tissue (MALT) that guard mucosal surfaces include all the following, EXCEPT __________.
b) lymphoid nodules in the wall of the bronchi
In addition to its lymphoid function, this organ holds a reservoir of platelets.
a)left lymphatic ductIn
The lymphoid tissue's structural framework of is composed of __________.
b)reticular connective tissue
c)dense, regular connective tissue
e)dense, irregular connective tissue
This structure, attached to the cecum, is in an ideal location to destroy bacteria before they breach the intestinal wall.
What lymphatic structure absorbs excess tissue fluid?
b) lymphatic duct
c) cisterna chyli
d) lymphatic capillary
e) lymphatic trunk
What lymphatic structure absorbs lipids in the intestine?
a) lymphatic trunk
b) lymphatic duct
d) collecting vessel
What lymphatic structures trap bacteria in the posterior oral cavity?
Which of the following are located in the spleen's white pulp?
b) blood vessels
Which sequence best describes the flow of lymph through the lymphatic system?
a) ducts, vessels, trunks, capillaries
b) capillaries, trunks, vessels, ducts
c) ducts, trunks, capillaries, vessels
d) capillaries, vessels, trunks, ducts
e) trunks, capillaries, vessels, ducts
Which statement below describes the lymphatic system's role in relation to the cardiovascular system?
a) It is the major source for distribution of all hormones.
b) It maintains blood volume and, hence, pressure.
c) It serves as a pathway for distribution of neutrophils, eosinophils, and basophils.
d) It helps regulate cardiac activity.
e) It is the primary source for regulation of blood pressure.
Which statement is true of the thoracic duct?
a) It drains the lymph from the right head, neck, shoulder, arm, and upper right chest.d
b) It forms from the merging of collecting vessels from the left upper limb and neck
c) It drains lymph only from the arms.
d)It drains the lymph from the entire left side of the body and the right abdomen and leg.
e)It forms from the merging of collecting vessels on the right side of the body.
Which statement is true about lymph nodes?
a)There is a dense collection located in the feet and hands.
b)They may reach the size of a golf ball.
c) They have fewer efferent vessels than afferent vessels.
d)There are over 10,000 located throughout the body.
e)they contain dense collections of all five leukocyte types.
Which of the following best describes the arrangement of lymphatic vessels?
a) a system that carries lymph through lymphatic arteries, lymphatic capillaries, and lymphatic veins
b) a system that pumps lymph through lymphatic ventricles to the lymphatic capillaries and through lymph veins back to the atria
c) a system that collects fluid from arteries and veins and takes it into lymphatic arteries to be pumped back to the blood circulation
d) a one-way system of vessels beginning with blind-ended lymphatic capillaries
f) a system of large vessels designed to fill quickly with lymph as the heart pushes blood through the coronary sinus
Which of the following is the major lymphoid organ that "trains" T lymphocytes to become immunocompetent?
Which of the following are the principal lymphoid organs in the body?
The lymphoid organ(s) located in the throat that defend(s) against invading bacteria coming in through the mouth and nose is (are) __________.
a) Peyer's patches
Which of the following statements about the spleen is FALSE?
a)It is best to perform a splenectomy if the spleen is damaged in a car accident.
b)In children under the age of 12 years old, the spleen will regenerate if a small piece is left in the body.
c)The spleen's capsule is very thin and can be ruptured easily by a direct blow.
d)If the spleen is removed, the liver will take over its function.
Which of the following vessels transport fluid that leaks from the vascular system back into the blood?
Excess tissue fluid in the brain drains into the __________.
Lymphangitis presents itself as __________.
a)severe localized edema
b)tender lymph nodes that are filled with pus
c)enlarged tender tonsils
d) red lines under the skin that are sensitive to touch
Which of the following features is NOT common to both lymphatic collecting ducts and veins?
a)transport of chyle
b)anatomical distributions of each vary between individuals
c)the presence of valves
d)a wall made of three tunic layers
When B lymphocytes are dividing rapidly, the __________ of the lymphoid tissue enlarge(s).
b)diffused lymphoid tissue
c) germinal centers
d) lymphoid nodules
Where are plasma cells found in a lymph node?
a)in the medullary cords
b)in the cortex
c)in the lymph sinuses
d)in the capsule
Large lymph capillaries in a lymph node spanned by crisscrossing reticular fibers are known as __________.
Which of the following cells would NOT be found in a germinal center in a lymph node?
c) B lymphocytes
d) dendritic cells
Which lymphatic structure may also be a site of erythrocyte production in the fetus?
Areas of lymphocytes suspended by reticular fibers in the spleen are known as __________.
A sentinel node is the first lymph node __________.
a)that receives lymph drainage from a body area suspected of cancer
b)that contains mature lymphocytes
c)to produce an antibody in an immune reaction
d)to encounter an antigen