question archive 1) Negative selection of developing B cells ensure that a
1) Negative selection of developing B cells ensure that a
Subject:BiologyPrice: Bought3
1) Negative selection of developing B cells ensure that
a. B cells do not leave secondary lymphoid tissues
b. clonal expansion of B cells does not occur in the absence of infection
c. only antigen-activated B cells leave the bone marrow
d. B-cell receptors that bind to sell antigens to be released from bone marrow
2. If a cells lacks co-stimulatory molecules presents peptide: MHC complexes to a T cell specific for that peptide, then the cells is ask to
a. express the IL-2 receptor
b. undergo anergy
c. be dependent of T8 cells for activation
d. differentiates into a TH1 cells
3. which of the following is a feature of regulatory T cells(Treg)
a. Treg express inflammatory cytokines
b. inactivates both T-helper and T-cytotoxic cells
c. Physical association between Treg and their target cells is not required for Treg function
d. Treg express CD8 and control effector cells by inducing apoptosis
4. Binding of ____ to ____ induces T-cell proliferation and differentiation of activated T cells
a. LFA-1; ICAM-1
b. IL-2; the affinity IL-2 receptor
c. CD28; B7
d. CD4' MHC class II
5. Match the cell type with its description
a. mature dendritic cells. b. TH17 cells c. TH2 cells d. TH1 cells e. TfH cells
1. ________ produces cytokines that activate B cells
2.________ facilitate antibody production and isotope switching
3.________ express cytokines that promote inflammation
4.________ possess elaborate finger-like processes that interact with T cells
5.________ involved in neutrophil recruitment to infected tissues
a. C, D, E, A, B
b. C, E, D, A, B,
c. D, C, B, A, E
d. D, C, A, B, E
