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37 Cards in this Set
- Front
- Back
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Which cell type is essential to the immune response?
A) monocytes B) keratinocytes C) fibrocytes D) lymphocytes |
lymphocytes
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Which of these statements about lymphocytes is false?
A) They are phagocytic. B) They mostly occur in lymphoid tissues. C) They occur as B, T, and NK types. D) They bind antigens. |
They are phagocytic
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T Cells can differentiate into:
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Cytotoxic T Cells
Helper T Cells Suppressor T Cells Memory T Cells |
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B Cells can differentiate into:
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plasma cells
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Which of these is not a property of lymphatic capillaries?
A) They lack basement membrane. B) They are smaller than blood capillaries. C) They have irregular profiles. D) Their endothelial cells overlap. |
They are smaller than blood capillaries
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Which of these is not a lymphoid organ?
A) liver B) spleen C) thymus D) lymph node |
liver
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Which of these organs does not drain its lymph into the thoracic duct?
A) left arm B) left leg C) right arm D) right leg |
right arm
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Which of the following is true of both lymphatic capillaries and blood capillaries?
A) Both types are composed of endothelium. B) Both types form continuous tubes. C) Both types have a diameter of approximately 8 micrometers. D) Both types allow the free entry of viruses and proteins. |
Both types are composed of entothelium
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All of these types of cells are lymphocytes except ______.
A) B B) Y2K C) NK D) T |
Y2K
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Which of these defense cells are NOT phagocytic?
A) neutrophils B) macrophages C) lymphocytes D) eosinophils |
Lymphocytes
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Which of these is not one of the nonspecific defenses?
A) histamine B) interferons C) neutrophils D) immunoglobulins |
immunoglobulins
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Natural Killer (NK) cells ___________.
A) hunt for tumor cells B) engage in immunological surveillance C) kill cancer cells D) NK cells perform all of these roles. |
NK cells perform ALL of these roles
(hunt for tumor cells, engage in immunological surveillance, kill cancer cells) |
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What is a complement?
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A complement is a defense mechanism where a group of proteins work together, binding to antibodies and forming large holes in target cells
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What are pyrogens?
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chemicals that increase body temperature
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What role do phagocytes play in the immune system?
A) prevention of hazardous organisms and materials from entering the body B) elevation of body temperature C) engulfing pathogens and cell debris D) coordination of defenses against viral infections |
engulfing pathogens and cell debris
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What role do interferons play in the immune system?
A) prevention of hazardous organisms and materials from entering the body B) elevation of body temperature C) engulfing pathogens and cell debris D) coordination of defenses against viral infections |
Coordination of defenses against viral infections
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Which of the following is NOT part of the inflammatory response?
A) blood flow diminished or eliminated around the site of injury B) capillary permeability increased C) clotting reaction walls off region D) phagocytes activated |
Blood flow diminished or eliminated around the site of injury
(Blood flow around the site of the injury is actually increased during the inflammatory response.) |
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Which of these is NOT a property of the immune response?
A) it may be antibody-mediated B) it may be cell-mediated C) it must be acquired D) it is triggered by an antigen |
it must be acquired
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Activated macrophages release endogenous pyrogens that cause _________.
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fever
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Immunity that results from vaccination against influenza is classified as __________.
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induced active
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Autoimmune illness results from a failure of what aspect of immunity?
A) versatility B) memory C) tolerance D) specificity |
tolerance
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The lymphocytes that enter tissues and directly attack antigens are __________ cells.
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cytotoxic T cells
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Which defense cells can specifically identify and directly kill disease cells?
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cytotoxic T lymphocytes
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Class ____ MHC displays antigens found in the cytoplasm of cells.
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Class I MHC
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Which class of T lymphocyte is killed by the AIDS virus?
A) cytotoxic T B) NK C) helper T D) suppressor T |
Helper T
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Steps in antigen presentation include which of these?
A) Phagocytic antigen-presenting cells engulf pathogens. B) Antigens are digested. C) Antigen fragments appear on the antigen-presenting cell's surface. D) Antigen presentation includes all of these steps. |
Antigen presentation includes all of these steps
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Class II MHC proteins are found on which of the following cell types?
A) antigen-presenting cells B) all nucleated cells |
antigen-presenting cells
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Which class of MHC proteins presents exogenous antigens?
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Class II MHC proteins
(Class II MHC proteins present antigens that originated from outside the cell) |
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Class I MHC proteins are recognized by which of the following cell types (that are destined to become T cells)?
A) CD8 B) CD4 |
CD8
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Which of the following types of cells display protein fragments produced by the cancer within them?
A) all nucleated cells B) B cells C) macrophages D) dendritic cells |
all nucleated cells
(nucleated body cells bring pieces of endogenous proteins to the surface to display on the MHC protein) |
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Which major class of lymphocytes become cytotoxic T cells?
A) CD4 B) CD6 C) CD8 |
CD8
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Which of these is not a step in humoral immune defense?
A) The antigen binds specifically to B cell surface. B) Helper T cells secrete cytokines. C) T cells secrete immunoglobulins. D) The antigen-specific helper T cells bind to sensitized B cells. |
T cells secrete immunoglobulins
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B cells are ____________.
A) sensitized by exposure to antigen B) activated by helper T cells C) capable of division D) B cells have all of these properties. |
B cells have all of these properties
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Which class of immunoglobulins sensitizes cells to allergens?
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IgE
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Each of these is a class of immunoglobulins except __________.
A) IgG B) IgA C) IgB D) IgM |
IgB
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Antigen binds to the ____________________ of each arm of an antibody molecule.
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variable segment
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A change in the immune system that rarely accompanies aging is __________.
A) improved immunological surveillance B) fewer cytotoxic T cells C) T cells less responsive to antigens D) fewer helper T cells |
improved immunological surveillance
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