Ch. 22 Hw Flashcards
Which of these is not considered a physical or chemical barrier?
macrophages
When B and T cells are fully developed and mature, they are described as being
immunocompetent
Which class of cells includes macrophages, B cells, and dendritic cells?
antigen presenting cells
What class of disorders, including aids and scid, involves the destruction of B and T cells resulting in the inability of the immune system to protect the body from pathogens?
Immunodeficiency diseases
An acute (Type I) allergic response can lead to:
Anaphylactic shock
Which cell must be activated in order to achieve virtually all cell mediated immune responses?
helper T cells
Which of the following is an effect of stress on the immune system?
inhibition of the immune system
Which of the following is not considered an organ of the immune system?
pancreas
The left subclavian vein receives lymph from the
thoracic duct
Which organ produces a hormone that promotes maturation of T cells?
thymus
Which of the following is a function of the lymphoid system?
drain excessive interstitial fluid, transport dietary lipids, carry out immune response
Which of the following cells exist in the greatest variety in the immune system?
lymphocyte
Which type of immunity defends against any type of invader?
nonspecific
Which of the following is not a secondary lymphatic organ and or tissue?
red bone marrow
Which of the following is considered a primary lymphoid organ?
bone marrow
Cytotoxic T cells may kill infected target cells by
inducing apoptosis in the target cell and creating channels in the target cell membrane
You ate some contaminated shellfish and have developed a hepatitis A infection. Your physician injects you with gamma globulin which contains antibodies to hepatitis A. This is an example of
Artificially acquired passive immunity
Which of these provides a non-specific second line of defense?
macrophages
Which of the following is not considered an antibody action to disable antigens?
deactivating the complement system
The first signal required for activation of a T cell is
binding of antigen to the TCR
___ are actively phagocytic cells
macrophages and neutrophils
A secondary invasion of an antigen may produce no sign or symptoms due to the action of:
memory cells
Which is not true of the cytokines?
are secreted by erythrocytes
