A&P II (Chapter 20)

Which of the following would not be classified as a lymphatic organ? pancreas. spleen. tonsils. Peyer's patches of the intestine

Both lymph and venous blood flow are heavily dependent on: the pumping action of the heart. skeletal muscle contractions. contraction of the vessels themselves. ability of lymph to leave the lymphatic vessels.

The thymus is most active during: fetal development. childhood. adulthood. old age.

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

The lymphatic capillaries are: more permeable than blood capillaries. less permeable than blood capillaries. equally permeable to blood capillaries. completely impermeable.

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

Lymph leaves a lymph node via: efferent lymphatic vessels. afferent lymphatic vessels. the cortical sinus. the subscapular sinus.

Functions of the spleen include all of those below except: removal of old or defective red blood cells. contains crypts that trap bacteria. storage area for blood platelets. storage area of iron.

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

The soft connective tissue in the spleen is called: dense regular connective tissue. dense irregular connective tissue. loose connective tissue. reticular connective tissue.

Which is not a mucosa-associated lymphatic tissue? tonsil. thymus. Peyer's patch. appendix.

Lymph collecting from the lower extremities would be delivered to this area first before moving on up. thoracic duct inguinal nodes cisterna chyli azygos

A buboe is a(n): wall in a lymph node lobe of the spleen infected Peyer's patch infected lymph node

Particularly large clusters of lymph nodes occur in all of the following locations except the: inguinal region. cervical region. axillary region. lower extremities.

What is the function of a Hassall's corpuscle? increases the surface area of the thymic cortex. assists in the production of lymphocytes. forms the blood-thymus barrier. has no known significant function.

Digestive tract-associated lymphatic tissue includes all of the following except: Peyer's patches. palatine tonsils. lingual tonsils. islets of Langerhans.

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

Which cells become immunocompetent due to thymic hormones? basophils lymphocytes macrophages monocytes

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

Which of the following are functions of lymphoid tissue? house and provide a proliferation site for lymphocytes house and provide a proliferation site for macrophages furnish an ideal surveillance vantage point for lymphocytes and macrophages a and c

The ________ are the simplest lymphoid organs and are found at the entrance to the pharynx. Peyer's patches tonsils MALT cisternae chyli

Highly specialized lymph capillaries called ________ are present in the villi of the intestinal mucosa. nodules ductal trunks lacteals

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

The appendix, tonsils, and Peyer's patches are ________. MALT lacteals lymph collecting structures. not parts of the lymphatic system

When tissues are inflamed, lymphatic capillaries develop openings that permit uptake of: small particles pathogens cancer cells. b and c.

Isolated clusters of lymph follicles found in the wall of the small intestine.

Part of MALT

Largest lymphatic organ

Small organs intimately associated with lymphatic vessels.

Receives lymph from most of the body.

Stores blood platelets

Protein-containing fluid within lymphatic vessels.

Area where efferent lymphatic vessels leave the lymph node.

Lymphatic vessels _________. remove excess fluid from interstitial spaces drain blood from the spleen are part of the venous system are a lot like arteries

Lymphatic capillaries owe their permeability to the presence of __________. an open end that siphons fluid from the interstitial space numerous minivalves in their walls gap junctions between adjacent cells small proteins in the lymph fluid

Which of the following contribute(s) to the movement of lymph through lymphatic vessels? the pumping of the heart the milking action of skeletal muscle contraction pressure changes in the thorax that result from breathing both b and c

The ______ is the largest lymphoid organ. lymph node spleen thymus tonsil

Lymph node clusters would be found in the ________. esophagus brain armpits intestines

Lymph tends to stall inside lymph nodes because __________. small-diameter spaces within the medulla. fewer efferent lymphatic vessels than afferent lymphatic vessels. the large volume of lymph entering the node. fewer afferent lymphatic vessels than efferent lymphatic vessels.

What characteristic differentiates lymphoid tissue from a lymph node? immune response area contains B cells does not filter lymph contains T cells

What lymphoid tissue/organ removes defective red blood cells from the blood? lymph node thymus spleen Peyer's patches

The thymus is important for _______. T lymphocyte maturation removal of foreign antigens B lymphocyte maturation secretion of hormones that promote B lymphocyte immunocompetence

Red pulp of the spleen is mostly concerned with _______, while white pulp is mostly concerned with _________. immunity / new red blood cell formation filtering lymph / T lymphocyte formation blood filtering / immunity urine formation / blood filtering