Questions and Answers
Which of these is not one of the nonspecific defenses?
The lymphatic system does all of the following, except that it
The cells directly responsible for cellular immunity are the ________ cells.
cytotoxic T
If the thymus shrank and stopped making thymosins, we would expect to see an immediate decrease in the number of
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Which class of immunoglobulins sensitizes cells to allergens?
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Which of these statements about lymphocytes is false?
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In general, lymphocytes
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The cells responsible for humoral immunity are the ________ cells.
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The cells responsible for the production of circulating immunoglobulins are ________ cells.
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Microphages include
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Autoimmune illness results from a failure of what aspect of immunity?
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When an antigen is bound to a Class I MHC molecule, it can stimulate a ________ cell.
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Class II MHC molecules are found only on which of the following?
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When an antigen is bound to a Class II MHC protein, it can activate a ________ cell.
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Class II MHC proteins are present in the plasma membrane only
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During a primary immune response, the
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Delayed hypersensitivity is a type of __________.
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The only antibodies that normally cross the placenta are
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Autoantibodies are
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Study Notes
Nonspecific Defenses
- Histamine, immunoglobulins, neutrophils, and interferons are components of immune response; immunoglobulins are not considered nonspecific defenses.
Lymphatic System Functions
- The lymphatic system maintains normal blood volume, fights infection, transports lipids from the digestive tract, but does not transport gases to and from lymph nodes.
Cellular Immunity
- Cytotoxic T cells are directly responsible for cellular immunity.
Thymus and T Cells
- A reduction in thymosin production due to thymus shrinkage results in decreased T cells.
Immunoglobulin Classes
- IgE immunoglobulins are responsible for sensitizing cells to allergens.
Lymphocyte Characteristics
- Lymphocytes bind antigens, are primarily located in lymphoid tissues, exist as B, T, and NK types, but are not phagocytic.
Lymphocyte Activity
- Lymphocytes predominantly spend their time in lymphatic tissue rather than circulating in the blood.
Humoral Immunity
- B cells are responsible for humoral immunity.
Production of Immunoglobulins
- Plasma cells are responsible for the production of circulating immunoglobulins.
Types of Microphages
- Microphages include both neutrophils and eosinophils.
Autoimmune Illness
- A failure of tolerance in immunity can result in autoimmune illnesses.
MHC Class I and Cytotoxic T Cells
- Antigens bound to Class I MHC molecules stimulate cytotoxic T cells.
MHC Class II Localization
- Class II MHC molecules are exclusively found on lymphocytes and antigen-presenting cells.
MHC Class II Activation
- Antigens bound to Class II MHC proteins can activate helper T cells.
Presence of Class II MHC Proteins
- Class II MHC proteins are present in the plasma membrane of antigen-presenting cells and lymphocytes.
Primary Immune Response
- During the primary immune response, the IgM titer is initially higher than the IgG titer.
Delayed Hypersensitivity
- Delayed hypersensitivity is classified as a type of allergy.
Antibodies Crossing the Placenta
- IgG is the only antibody that typically crosses the placenta.
Autoantibodies
- Autoantibodies are directed against the body's own antigens and are significant in autoimmune responses.
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Description
Prepare for your Anatomy & Physiology final with this review of Chapter 22. These flashcards cover key concepts such as nonspecific defenses and the lymphatic system's functions. Test your knowledge and ensure you're ready for exam day!
