The difference between T cell activation by normal antigens and T cell activation by superantigens is that superantigens
A) suppress cytokine release.
B) are not processed and presented by APCs.
C) are not processed and presented by APCs and cause nonspecific activation of many T cells at once, including those that would not normally recognize the antigen.
D) cause nonspecific activation of many T cells at once, including those that would not normally recognize the antigen and suppress cytokine release.
E) cause nonspecific activation of many T cells at once, including those that would not normally recognize the antigen.
Answer: C
You might also like to view...
Embryonic plants are nourished by nutrients in endosperm and the ____, but not by nutrients in fruits
a. cotyledons b. seed coat c. germ d. bran e. ovary wall
Recombinant DNA is any DNA that
a. has been cut by restriction enzymes. b. is at least four to eight base pairs in length. c. has had its gene sequence rearranged. d. consists of base pairs from two or more organisms e. is none of these.
A hormone is produced in small amounts in a tissue, and it causes a physiological action within that same tissue soon after its production.
Answer the following statement true (T) or false (F)
The growth that pushes a root down through the soil takes place through
A) cell elongation at the tip of the root cap. B) cell division in the apical meristem. C) cell elongation behind the root tip. D) differentiation of xylem cells in the apical meristem.