Quiz 4 Flashcards
produced when a person has and recovers from a disease
naturally acquired active immunity
when a person is vaccinated, they have this
artificially acquired active immunity
when antibodies are passed from mother to offspring via the placenta or breast milk
naturally acquired passive immunity
when antibodies are given to a person, for example, antibiotics
artificially acquired passive immunity
what are the 4 types of T cell progeny?
helper, regulatory, cytotoxic, memory
3 functions of helper T cells
they activate macrophages, B cells, and cytotoxic T cells
cytotoxic T cells lead to the destruction of
virus infected cells and cancer cells
cytotoxic T cells has which co-receptor and binds to which complex?
CD8 and binds to MHC I
helper T cells has which co-receptor and binds to which complex?
CD4 and binds to MHC II
2 types of progeny of B cells
plasma cells and memory cells
what cells release antibodies into the tissues and blood?
plasma cells
What cells are responsible for activating T helper cells?
APC
What cells are responsible for activating T cytotoxic cells?
T helper cells
what are the antigen presenting cells?
B cells, macrophages, and dendritic cells
these cells internalize and process antigens, presenting MHC II receptors that activate T helper cells
APC
Which cells express MHC I?
all nucleated cells have this complex. When infected with a virus, a cell will process it and send it to the MHC I.
what happens during the first encounter with an allergen (antigen)?
body becomes sensitized (forms antibodies); no visible signs are noticed
what happens during the second encounter with an allergen (antigen)?
the antibodies on mast cells and basophils cause an allergic reaction, histamine is released
what is the role of histamine in an allergic response?
permeability and vasodilation of blood capillaries and bronchial constriction (labored breathing)
Blood type A can receive blood from
O and A
Blood type B can receive blood from
O and B
Blood type AB can receive blood from
universal recipient