MSU anatomy Lymphatic and immune system practice questions

Which of the following statements about lymphatics is incorrect? A) Lymph capillaries are highly permeable. B) Their wall contains three layers, just like blood vessels. C) Connecting vessels are easily identified in dissection. D) They contain valves.

Connecting vessels are easily identified in dissection

B lymphocytes are to ________ as T lymphocytes are to ________. A) antigens; antibodies B) antibodies; a cell-mediated lethal hit C) a cell-mediated lethal hit; antibodies D) antibodies; antigens

antibodies; a cell-mediated lethal hit

The lymph trunk that drains the thoracic organs is called the A) great cardiac trunk. B) bronchomediastinal trunk. C) posterior intercostal trunk. D) azygos trunk.

bronchomediastinal

Memory cells A) are only T cells not B cells. B) are fixed in the lymphoid connective tissues and never recirculate. C) look different than other lymphocytes (i.e., can be differentiated under the light microscope). D) can live for 70 years or more.

can live for 70 years or more

The system of lymphatic vessels performs all of the following functions except A) returning excess tissue fluid to the bloodstream. B) carrying blood. C) transporting digested fats. D) returning leaked blood proteins to the bloodstream.

carrying blood

The largest kind of lymphatic vessel is a lymphatic A) capillary. B) sinus. C) trunk. D) duct.

duct

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

efferent lymphatic vessles

In a histological cross-section through an artery, a vein, and a lymphatic vessel, one can recognize the lymphatic vessel because it A) has the thickest tunica media. B) has the thinnest walls. C) always lies closest to the artery, which has the thinnest walls. D) has the fewest valves.

has the thinnest walls

Clusters of lymph nodes occur in all of the following sites except A) along the aorta. B) in the mediastinum. C) in the inguinal region. D) in bones and bone marrow.

in bones and bone marrow

The lymph trunk that contains chyle and is unpaired is the A) jugular. B) intestinal. C) subclavian. D) right lymph trunk.

intestinal

The lymph trunk that carries lymph from the lower limb is the A) femoral trunk. B) iliac trunk. C) lumbar trunk. D) cisterna chyli.

lumbar trunk

Which of the following is not a part of MALT? A) lymphocytes in the spleen B) aggregated lymphoid nodules C) lymphoid tissue in the appendix D) lymphoid tissue in the tonsils

lymphocytes in the spleen

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

more permeable than blood capillaries

Which of the following cells are the largest producers of antibodies? A) plasma cells B) T lymphocytes C) B lymphocytes D) macrophages

plasma cells

The bulges that give lymph vessels a string-of-beads appearance are really A) weakenings in the wall of the vessels. B) temporary constrictions caused by bulging skeletal muscles that squeeze the lymph vessel. C) pockets for valves. D) lymph nodes.

pockets of valves

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

right lymphatic duct

Lymphatic capillaries are absent in all of the following except A) bone marrow. B) the central nervous system. C) teeth. D) skin.

skin

Which of the following lymphoid structures have a hilus? A) MALT B) thymus and aggregated lymphoid nodules C) tonsils and appendix D) spleen and lymph nodes

spleen and lymph nodes

Edema is A) an infection of the lymph nodes. B) an infection of the lymphatic vessels. C) the accumulation of excess tissue fluid in loose connective tissue. D) a form of cancer.

the accumulation of excess tissue fluid in loose connective tissue

In humans, B lymphocytes originate in A) all lymphoid tissue. B) the thymus. C) the appendix. D) the bone marrow.

the bone marrow

Lymphocytes attack antigens mostly in lymphoid tissue and in A) the main type of loose connective tissue called areolar connective tissue. B) cartilage. C) the thymus. D) the bloodstream.

the main type of loose connective tissue called areolar connective tissue

A lymphatic nodule is A) one B lymphocyte. B) a small lymph node. C) a bulge in a lymphatic collecting vessel. D) the same as a lymphatic follicle.

the same as a lymphatic follice

Which of the following lymphoid organs does not directly fight antigens? A) tonsil B) spleen C) the thymus D) Peyer's patches

the thymus

How does age affect the size of the thymus? A) The size of the thymus increases in the elderly. B) The thymus first becomes fatty, then gains more lymphocytes as it enlarges. C) The thymus is not affected by age. D) The thymus decreases in size relative to other organs in the body.

the thymus decreases in size relative to other organs in the body

Lymph capillaries differ from blood capillaries in all of the following ways except that A) they are blind ended. B) they carry lymph instead of blood. C) they are more permeable than most blood capillaries. D) their walls consist of endothelial cells.

their walls consist of endothelial cells

Lymphoid tissue contains all of the following elements except A) thick collagen fibers. B) T cells. C) follicles. D) B cells.

thick collagen fibers

The lymph organ that lies in the superior part of the thoracic mediastinum is the A) tonsils. B) spleen. C) cervical lymph nodes. D) thymus.

thymus