Which of the following does(do) not belong to the second line of defense? - Answers The
gastric juices
__________ lacks the capacity to remember a pathogen or react differently to it in the future,
whereas __________ utilizes memory cells to adapt to a given pathogen and ward it off more
easily in the future. - Answers Nonspecific resistance; adaptive immunity
__________ are found especially in the mucous membrane, standing guard against parasites and
allergens. - Answers Eosinophils
Complement fixation cannot lead to __________. - Answers endogenous pyrexia
__________ are secreted by cells infected with viruses, alerting neighboring cells and protecting
them from becoming infected. - Answers Interferons
When an enemy cell is present, a(n)__________ secrete perforins, which bore a hole in the enemy
cell membrane. - Answers natural killer cell
A pyrogen is a substance that causes __________. - Answers fever
__________ is not a cardinal sign characteristic of inflammation. - Answers fever
One group of proteolytic enzymes secreted by natural killer (NK) cells is __________. - Answers
granzymes
One characteristic of the immune response is specificity. This means that __________. - Answers
immunity is directed against a particular pathogen
Vaccination stimulates __________ immunity. - Answers artificial active
A(n) __________ is the region of the molecule that is recognized by antibodies. - Answers epitope
T cells achieve immunocompetence in the __________. - Answers Thymus
Helper T (T H) cells recognize antigens when they are bound to a(n) __________. - Answers major
histocompatibility complex (MHC) protein
__________ participate in both nonspecific resistance and immune response. - Answers Helper T
(T H) cells
Cytotoxic T (T C) cells are like natural killer (NK) cells because they both __________. - Answers
secrete granzymes and perforin
Which of the following is something antibodies do not do? - Answers Differentiate into memory
antibodies, which upon re exposure to the same pathogen would mount a quicker attack