Exam 3: Lymphatic & Immunity,
Respiratory, Digestive, Urinary System
With Correct Answers
The primary function of the lymphatic system is - Ans--defending the body
against both external and internal threats.
Functions of the lymphatic system - Ans---fights infection.
-eliminates variations in the composition of interstitial fluid.
-transports lipids from the digestive tract.
-helps maintain normal blood volume.
Most of the lymph returns to the venous circulation by way of the - Ans--
thoracic duct.
Specialized lymphatic capillaries called lacteals are - Ans--necessary for
the transport of dietary lipids.
MALT (mucosa-associated lymphoid tissue ) - Ans--collection of lymphoid
tissues that protect the epithelia of the digestive, respiratory, urinary, and
reproductive systems
A T cell can only become activated after being physically or chemically
stimulated by the abnormal target cell in a process called - Ans--
costimulation
Innate Immunity - Ans---nonspecific, does not distinguish one potential
threat from another
-depends on class of lymphocytes called NK cells
-defenses include physical barriers, phagocytes, immune surveillance,
interferons, compliment, inflation, fever
Adaptive Immunity - Ans---specific
, -based on activity of 2 classes of lymphocytes: T cells and B cells, respond
to specific antigens
-if a pathogen invades peripheral tissue, lymphocytes defend against that
particular pathogen, but not others
-also protects against further attacks from same type of pathogen
T cells - Ans---move quickly
B cells - Ans---move slowly
immune surveillance - Ans--the destruction of abnormal cells by NK cells in
peripheral tissues
interferons - Ans--chemical messengers that coordinate the defenses
against viral infections
complement - Ans--a system of circulating proteins that help antibodies
destroy pathogens. also lyses cells, and enhances phagocytosis and
inflammation
phagocytes - Ans---remove cellular debris and respond to invasion by
foreign substances or pathogens.
-Two classes: microphages and macrophages
microphages - Ans--neutrophils & eosinophils that circulate in the blood,
and enter peripheral tissues that have injury or infection
macrophages - Ans--large, active phagocytes. typically either fixed in
position or freely mobile.
Cytotoxic T cells - Ans--involved in direct cellular attack; enter peripheral
tissues & attack antigens physically & chemically
Helper T cells - Ans--stimulate the response of both T & B cells. V important
Regulatory T cells - Ans--a subset of T cells that moderate immune
response
Respiratory, Digestive, Urinary System
With Correct Answers
The primary function of the lymphatic system is - Ans--defending the body
against both external and internal threats.
Functions of the lymphatic system - Ans---fights infection.
-eliminates variations in the composition of interstitial fluid.
-transports lipids from the digestive tract.
-helps maintain normal blood volume.
Most of the lymph returns to the venous circulation by way of the - Ans--
thoracic duct.
Specialized lymphatic capillaries called lacteals are - Ans--necessary for
the transport of dietary lipids.
MALT (mucosa-associated lymphoid tissue ) - Ans--collection of lymphoid
tissues that protect the epithelia of the digestive, respiratory, urinary, and
reproductive systems
A T cell can only become activated after being physically or chemically
stimulated by the abnormal target cell in a process called - Ans--
costimulation
Innate Immunity - Ans---nonspecific, does not distinguish one potential
threat from another
-depends on class of lymphocytes called NK cells
-defenses include physical barriers, phagocytes, immune surveillance,
interferons, compliment, inflation, fever
Adaptive Immunity - Ans---specific
, -based on activity of 2 classes of lymphocytes: T cells and B cells, respond
to specific antigens
-if a pathogen invades peripheral tissue, lymphocytes defend against that
particular pathogen, but not others
-also protects against further attacks from same type of pathogen
T cells - Ans---move quickly
B cells - Ans---move slowly
immune surveillance - Ans--the destruction of abnormal cells by NK cells in
peripheral tissues
interferons - Ans--chemical messengers that coordinate the defenses
against viral infections
complement - Ans--a system of circulating proteins that help antibodies
destroy pathogens. also lyses cells, and enhances phagocytosis and
inflammation
phagocytes - Ans---remove cellular debris and respond to invasion by
foreign substances or pathogens.
-Two classes: microphages and macrophages
microphages - Ans--neutrophils & eosinophils that circulate in the blood,
and enter peripheral tissues that have injury or infection
macrophages - Ans--large, active phagocytes. typically either fixed in
position or freely mobile.
Cytotoxic T cells - Ans--involved in direct cellular attack; enter peripheral
tissues & attack antigens physically & chemically
Helper T cells - Ans--stimulate the response of both T & B cells. V important
Regulatory T cells - Ans--a subset of T cells that moderate immune
response
