Mastering A&P 6: The Lymphatic System – Flashcards

Which cell type is essential to the immune response? lymphocytes fibrocytes keratinocytes monocytes

Which of these statements about lymphocytes is false? They are phagocytic. They mostly occur in lymphoid tissues. They bind antigens. They occur as B, T, and NK types.

Which of these is not a property of lymphatic capillaries? Their endothelial cells overlap. They have irregular profiles. They are smaller than blood capillaries. They lack basement membrane.

Which of these is not a lymphoid organ? lymph node thymus liver spleen

Which of these organs does not drain its lymph into the thoracic duct? left arm right leg left leg right arm

Which of the following is true of both lymphatic capillaries and blood capillaries? Both types have a diameter of approximately 8 micrometers. Both types are composed of endothelium. Both types allow the free entry of viruses and proteins. Both types form continuous tubes.

All of these types of cells are lymphocytes except ___________. B T NK Y2K

Which of these defense cells are not phagocytic? neutrophils lymphocytes eosinophils macrophages

Which of these is not one of the nonspecific defenses? interferons neutrophils histamine immunoglobulins

What defense mechanism is shown in this image? Effects of interferon Destruction by an NK cell Action of complement Antibody activation

What role do phagocytes play in the immune system? engulfing pathogens and cell debris prevention of hazardous organisms and materials from entering the body elevation of body temperature coordination of defenses against viral infections

What role do interferons play in the immune system? prevention of hazardous organisms and materials from entering the body elevation of body temperature engulfing pathogens and cell debris coordination of defenses against viral infections

Which of the following is NOT part of the inflammatory response? clotting reaction walls off region phagocytes activated capillary permeability increased blood flow diminished or eliminated around the site of injury

Which of these is not a property of the immune response? It may be cell-mediated. It must be acquired. It may be antibody-mediated. It is triggered by an antigen.

Activated macrophages release endogenous pyrogens that cause __________. histamine release pain swelling fever

Immunity that results from vaccination against influenza is classified as __________. naturally acquired passive naturally acquired active induced passive induced active

Autoimmune illness results from a failure of what aspect of immunity? memory tolerance versatility specificity

The lymphocytes that enter tissues and directly attack antigens are __________ cells. helper T NK suppressor T cytotoxic T

Which defense cells can specifically identify and directly kill disease cells? B lymphocytes cytotoxic T lymphocytes plasma cells suppressor T lymphocytes

Which class of T lymphocyte is killed by the AIDS virus? helper T suppressor T NK cytotoxic T

Steps in antigen presentation include which of these? Phagocytic antigen-presenting cells engulf pathogens. Antigens are digested. Antigen fragments appear on the antigen-presenting cell's surface. Antigen presentation includes all of these steps.

Class II MHC proteins are found on which of the following cell types? antigen-presenting cells all nucleated cells

hich class of MHC proteins presents exogenous antigens? class I MHC proteins class II MHC proteins

Class I MHC proteins are recognized by which of the following cell types (that are destined to become T cells)? CD4 CD8

Which of the following types of cells display protein fragments produced by the cancer within them? all nucleated cells macrophages dendritic cells B cells

Which major class of lymphocytes become cytotoxic T cells? CD4 cells CD6 cells CD8 cells

Which of these is not a step in humoral immune defense? The antigen-specific helper T cells bind to sensitized B cells. Helper T cells secrete cytokines. T cells secrete immunoglobulins. The antigen binds specifically to B cell surface.

B cells are __________. capable of division activated by helper T cells sensitized by exposure to antigen B cells have all of these properties.

Which class of immunoglobulins sensitizes cells to allergens? IgA IgG IgE IgM

Each of these is a class of immunoglobulins except __________. Immunoglobulin G Immunoglobulin B Immunoglobulin M Immunoglobulin A

A change in the immune system that rarely accompanies aging is __________. improved immunological surveillance T cells less responsive to antigens fewer helper T cells fewer cytotoxic T cells