final examchapter 20

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

D) It has follicles similar to those in the spleen

Which of the following is not a function of the lymphatic system? A) draining excess interstitial fluid B) carrying out immune responses C) transporting dietary fats D) transporting respiratory gases

D) transporting respiratory gases

Lymph leaves a lymph node via ________. A) efferent lymphatic vessels B) afferent lymphatic vessels C) the cortical sinus D) the subcapsular sinus

A) efferent lymphatic vessels

The tonsils located at the base of the tongue are the ________. A) lingual tonsils B) palatine tonsils C) pharyngeal tonsils D) Peyer's tonsils

A) lingual tonsils

The lymphatic capillaries are ________. A) more permeable than blood capillaries B) less permeable than blood capillaries C) as permeable as blood capillaries D) completely impermeable

A) more permeable than blood capillaries

Which of the following would not be classified as a lymphatic structure? A) pancreas B) spleen C) tonsils D) Peyer's patches of the intestine

A) pancreas

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

A) tonsil

The thymus is most active during ________. A) fetal development B) childhood C) middle age D) old age

B) childhood

Functions of the spleen include all of those below except ________. A) removal of old or defective blood cells from the blood B) forming crypts that trap bacteria C) storage of blood platelets D) storage of iron

B) forming crypts that trap bacteria

Peyer's patches are found in the ________. A) duodenum of the small intestine B) ileum of the small intestine C) large intestine D) jejunum of the small intestine

B) ileum of the small intestine

Small organs associated with lymphatic vessels are termed ________. A) lymph follicles B) lymph nodes C) lacteals D) lymphatics

B) lymph nodes

Which cells become immunocompetent due to thymic hormones? A) basophils B) lymphocytes C) macrophages D) monocytes

B) lymphocytes

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

B) plasma cells

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

C) Lymphoid tissue is predominantly reticular connective tissue.

Highly specialized lymph capillaries called ________ are present in the villi of the intestinal mucosa.

lacteals

corpuscles are always found in the lighter-colored ________ regions of the thymus.

medullary

The ________ are the simplest lymphoid organs and are found at the entrance to the pharynx.

tonsils

Lymphatic ________ are formed from the union of the largest collecting vessels.

trunks

Splenic ________ pulp is primarily concerned with immune functions of the spleen.

white

The ________ pulp of the spleen forms cuffs around the central arteries.

white

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

B) B cells produce plasma cells, which secrete antibodies into the blood.

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

B) severe localized edema distal to the blockage of that limb

Which of the following does not contain a mucosa-associated lymphatic tissue? A) tonsil B) thymus C) Peyer's patch D) appendix

B) thymus

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

C) produce lymph fluid and cerebrospinal fluid

Which of the following is not a normal component of lymph? A) water B) plasma proteins C) red blood cells D) ions

C) red blood cells

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

C) right lymphatic duct

Lymph transport involves all but which of the following? A) milking action of active muscle fibers B) thorax pressure changes during breathing C) smooth muscle contraction in the lymph capillary walls D) lymph capillary minivalve action

C) smooth muscle contraction in the lymph capillary walls

Which of the following are functions of lymphoid tissue? A) house and provide a proliferation site for lymphocytes B) house and provide a proliferation site for neutrophils C) furnish an ideal surveillance vantage point for lymphocytes and macrophages D) A and C

D) A and C

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

D) Lymph transport depends on the movement of adjacent tissues, such as skeletal muscles.

What is a bubo? A) a wall in a lymph node B) a lobe of the spleen C) an infected Peyer's patch D) an infected lymph node

D) an infected lymph node

Which of the following is not a method that maintains lymph flow? A) skeletal muscle contraction B) breathing C) valves in lymph vessel walls D) capillary smooth muscle contraction

D) capillary smooth muscle contraction

Lymph capillaries are absent in all except which of the following? A) bones and teeth B) bone marrow C) CNS D) digestive organs

D) digestive organs

The thymus is the only lymphoid organ that does not ________. A) have lymphocytes B) produce hormones C) have a cortex and medulla D) directly fight antigens

D) directly fight antigens

Which of the following is not a part of the lymphatic system? A) lymphatic vessels B) lymph nodes C) lymph D) erythrocytes

D) erythrocytes

Digestive tract-associated lymphatic tissue includes all of the following except ________. A) Peyer's patches B) palatine tonsils C) lingual tonsils D) islets of Langerhans

D) islets of Langerhans

Large clusters of lymph nodes occur in all of the following locations except the ________. A) inguinal region B) cervical region C) axillary region D) lower extremities

D) lower extremities

A sentinel node is ________. A) a lymph node found in the intestinal lamina propria B) the first node at the junction of all the lumbar trunks C) a small node in the spleen D) the first node to receive lymph from an area suspected to be cancerous

D) the first node to receive lymph from an area suspected to be cancerous

All the lymphoid organs are well developed before birth. True or False

FALSE

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

FALSE

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

FALSE

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

FALSE

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

FALSE

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

FALSE

The simplest lymphoid organs are the lymph nodes. True or False

FALSE

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

FALSE

The appendix, tonsils, and Peyer's patches are examples of ________.

MALT

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

TRUE

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

TRUE

Chyle is delivered to the blood via the lymphatic system. True or False

TRUE

Digested fats are absorbed from the intestine by the lymph capillaries. True or False

TRUE

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

TRUE

Lymph capillary permeability is due to minivalves and protein filaments. True or False

TRUE

Lymphatic capillaries are permeable to proteins. True or False

TRUE

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

TRUE

Lymphoid tissue is mainly reticular connective tissue. True or False

TRUE

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

TRUE

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

TRUE

Tonsils have blind-ended structures called ________.

crypts