HW-CH20

Tonsils have blind-ended structures called ________ that trap bacteria and particulate matter. tonsillar crypts lymphoid follicles germinal centers tonsillar corpuscles

The thymus is most active during ________. fetal development childhood old age middle age

Which of the following is NOT a method that maintains lymph flow? capillary smooth muscle contraction valves in lymph vessel walls skeletal muscle contraction breathing

Select the correct statement about lymphoid tissue. Lymphoid tissue is predominantly reticular connective tissue. T lymphocytes act by ingesting foreign substances. Once a lymphocyte enters the lymphoid tissue, it resides there permanently. Lymphoid macrophages secrete antibodies into the blood.

Which of the following is NOT a function of lymph nodes? produce lymph fluid and cerebrospinal fluid serve as antigen surveillance areas act as lymph filters and activate the immune system produce lymphoid cells and house granular WBCs

Peyer's patches are found in the distal portion of the ________. esophagus large intestine small intestine stomach

The tonsils located at the base of the tongue are the ________. pharyngeal tonsils lingual tonsils palatine tonsils Peyer's tonsils

Lymph transport involves all of the following EXCEPT ________. smooth muscle contraction in the lymph capillary walls lymph capillary minivalve action milking action of active muscle fibers thorax pressure changes during breathing

Lymphoid tissue that appears as a swelling of the mucosa in the oral cavity is called a(n) ________. thymus appendix tonsil Peyer's patch

Lymphatic ________ are formed from the union of the largest collecting lymphatic vessels. capillaries trunks nodes ducts

About 3 liters of fluid are lost to the tissue spaces every 24 hours and are returned to the bloodstream as lymph.

If even a small part of the spleen is left in a ten-year-old child, it will most likely regenerate itself.

When tissues are inflamed, lymphatic capillaries develop openings that permit uptake of large particles such as cell debris, pathogens, and cancer cells.

Which lymphoid organ atrophies as we age? tonsils appendix thymus spleen

Lymph leaves a lymph node via ________. efferent lymphatic vessels the subcapsular sinus afferent lymphatic vessels the cortical sinus

Lymphatic capillaries are present in ________. CNS digestive organs bone marrow bones and teeth

Which of the following would NOT be classified as a lymphoid organ? spleen Peyer's patches of the intestine pancreas tonsils

Lymphatic capillaries are permeable to proteins.

What is a bubo? a wall in a lymph node an infected lymph node an infected Peyer's patch a lobe of the spleen

Which of the following is NOT a part of the lymphatic system? lymph nodes lymphatic vessels lymph erythrocytes

Mucosa-associated lymphoid tissues include all of the following EXCEPT ________. Peyer's patches palatine tonsils islets of Langerhans lingual tonsils

Large clusters of lymph nodes occur in all of the following locations EXCEPT the ________. axillary region lower extremities inguinal region cervical region

Digested fats are absorbed from the intestine by the lymph capillaries.

Which of the following does NOT contain a mucosa-associated lymphatic tissue? tonsil thymus Peyer's patch appendix

The lymphatic capillaries function to absorb the excess protein-containing interstitial fluid and return it to the bloodstream.

Chyle is delivered to the blood via the lymphatic system.

Lymphocytes reside temporarily in lymphoid tissue, then move to other parts of the body.

Lymphoid tissue is mainly reticular connective tissue.

Which of the following is NOT a function of the lymphatic system? draining excess interstitial fluid carrying out immune responses transporting dietary fats transporting respiratory gases

Which lymphatic structure drains lymph from the right upper limb and the right side of the head and thorax? right lymphatic duct lumbar trunk thoracic duct cisterna chyli

Which of the following statements is FALSE regarding the spleen? Clusters of white pulp look like islands in a sea of red pulp. Red pulp is where immune functions take place. The spleen is the largest lymphoid organ. The splenic artery and vein enter and exit the spleen at the hilum.

Peyer's patches are clusters of lymphoid tissue found primarily in the large intestine.

The cisterna chyli collects lymph from the lumbar trunks draining the upper limbs and from the intestinal trunk draining the digestive organs.

Select the correct statement about lymph transport. Lymph transport is only necessary when illness causes tissue swelling. Lymph transport depends on the movement of adjacent tissues, such as skeletal muscles. Lymph transport is faster than that occurring in veins. Under normal conditions, lymph vessels are very high-pressure conduits.

Which of the following is considered a primary lymphoid organ? spleen appendix thymus tonsils

Flow of lymph through a lymph node is slowed due to ________. mini-valves fewer efferent vessels draining it compared to many afferent vessels feeding it the presence of lymphocytes and macrophages the viscous nature of lymph

Which of the following statements regarding the thymus is FALSE? It has follicles similar to those in the spleen. It does not directly fight antigens. It functions strictly in T lymphocyte maturation. Its stroma consists of epithelial tissue.

Small secondary lymphoid organs, which cluster along lymphatic vessels, are termed ________. lymph nodes lymph follicles lymphatics lacteals

Because lymph vessels are very low-pressure conduits, movements of adjacent tissues are important in propelling lymph through the lymphatics.

Lymphocytes can develop and mature in the ________. spleen tonsils red bone marrow lymph nodes

The blood testis barrier is to newly formed sperm cells as the blood thymus barrier is to ________. mast cells T lymphocyte precursors plasma cells white pulp

Which cells are the main "warriors" of the immune system? lymphocytes macrophages basophils monocytes

Like blood, lymph flows both to and from the heart.

The thymus is the only lymphoid organ that does not DIRECTLY fight antigens.

In the spleen, red pulp is involved in the immune functions and white pulp is involved in disposing of worn-out RBCs.

Functions of the spleen include all of those below EXCEPT ________. forming crypts that trap bacteria removal of old or defective blood cells from the blood storage of blood platelets storage of iron

There are more efferent lymphatic vessels leaving a lymph node than there are afferent vessels entering a lymph node.

Which of the following statements is FALSE? Antibodies mark antigens for destruction. T lymphocytes originate from the red bone marrow. Only lymph nodes filter lymph. The thymus consists mainly of lymphoid tissue.

Select the correct statement about lymphocytes. The two main types are T cells and macrophages. T cells are the only form of lymphocyte found in lymphoid tissue. T cells are the precursors of B cells. B cells produce plasma cells, which secrete antibodies into the blood.

The most important of the secondary lymphoid organs in the body are the lymph nodes.

The lymphatic capillaries are ________. completely impermeable as permeable as blood capillaries less permeable than blood capillaries more permeable than blood capillaries

From the right leg, lymph moves in which order? right lumbar trunk, right lymphatic duct, right subclavian vein right lumbar trunk, thoracic duct, right subclavian vein right lumbar trunk, right lymphatic duct, left subclavian vein right lumbar trunk, thoracic duct, left subclavian vein

The most important role of the spleen is to provide a site for lymphocyte proliferation and immune surveillance and response.

Lymph capillary permeability is due to minivalves and protein filaments.

Which of the following is NOT a normal component of lymph? ions red blood cells plasma proteins water

Antibodies that act against a particular foreign substance are released by ________. T lymphocytes plasma cells medullary cords lymph nodes

The thymus is the only lymphoid organ that does NOT ________. have a cortex and medulla have lymphocytes produce hormones directly fight antigens

When the lymphatic structures of a limb are blocked due to tumors, the result is ________. increased pressure in the lymphatics proximal in the limb to the blockage abnormally high lymph drainage from the distal region severe localized edema distal to the blockage of that limb shrinkage of tissues distal in the limb to the blockage due to inadequate delivery of lymph