Ch.15
The pharyngeal tonsils are the ones commonly removed in a tonsillectomy.
false
Lymphatic capillaries are much smaller and less permeable than blood capillaries.
false
Efferent lymphatics exit the lymph node at the ____, a slight depression on one side.
hilum
ability to resist infection
immunity
antibodies
immunoglobulins
The ____ trunk drains the head and neck.
jugular
Virus-invaded body cells and cancerous body cells are targeted by ____ T cells.
killer
There are special lymphatic vessels called ____ that absorb fats and transport them from the digestive tract to the blood.
lacteals
lymph vessels that absorb fats
lacteals
The ____ tonsils are located at the back surface of the tongue at its base.
lingual
The ____ trunk drains lymph from the lower extremities.
lumbar
T cells bind to antigens that have been engulfed, digested, and presented on the surface of a(n) ____.
macrophage
engulfs and digests antigens
macrophages
disease-causing organism
pathogen
lymph organ
spleen
An abnormal enlargement of the spleen that can develop from infections is called ____.
splenomegaly
The thoracic duct ultimately empties all of its lymph into the left ____ vein.
subclavian
The ____ gland is a bilobed mass of tissue in the mediastinum along the trachea.
thymus
The ____ is the site for lymphocyte maturation.
thymus
Leukemia is a disorder of the lymphatic system tissue that can be treated by a bone marrow transplant.
true
Memory cells are descendants of activated T and B cells produced during an initial immune response.
true
The primary function of the lymphatic system is to drain tissue spaces of protein-containing fluid that escapes from the blood capillaries.
true
The efferent vessels unite to form lymphatic ____.
trunks
produce antibodies
B cells
Immunoglobulin ____ is associated with allergic reactions, attacking allergy-causing antigens.
E
AIDS is caused by infection of ____ by HIV.
T lymphocytes
swelling
edema
The bulk of our lymphoid tissue is located in the ____.
lymph nodes
These oval-shaped structures are found along the length of lymphatics.
lymph nodes
The main collecting duct of the lymphatic system is the ____ duct.
thoracic
Antibodies are produced by____.
B lymphocytes
Immunoglobulin ____, found in tissue fluids and plasma, attacks viruses, bacteria, and toxins.
G
pharyngeal tonsils
adenoids
foreign proteins
antigens
Immunoglobulin ____ is found on the surface of B lymphocytes and is important in B cell activation.
D