Question

In: Biology

what type of cell activated cd4 T cells? -B cells -Mast cell -Macrophages and DC

what type of cell activated cd4 T cells?
-B cells
-Mast cell
-Macrophages and DC

Solutions

Expert Solution

Ans) Macrophages and DC

Explaination: CD4+ T cells or T helper cells are activated by professional antigen presenting cells (APCs) e.g.  macrophages, dendritic cell (DC)and B cells. MHC class II molecules are expressed on professional APCs .Dendritic cell express MHC class II molecules constitutively and most efficient as antigen presenting cells while others such as macrophage and B cell need to be activated before they can function as APCs  that's why option that include debdritic cell and macrophages is the right answer to this question.

MHCII molecules bind the exogenous peptide antigens and present it to T helper cells which get activated and then help both Bcells and cytotoxic T cell (CD8+T cell) to develop humoral and cellular immune response respectively.

Mast cells are part of proinflammatory response which secrete histamines , heparin, TNFα ,IL-4,5,6 and mediate allergic reactions but play no direct role in activation of CD4+ T cell.


Related Solutions

B cells are activated by CD4 TH2 cells only if both cell types recognize the same...
B cells are activated by CD4 TH2 cells only if both cell types recognize the same antigen. The same epitope, however, does not need to be shared for recognition. 1. Discuss why this characteristic is important in vaccine design. 2. Provide an example of a conjugate vaccine used to stimulate the synthesis of IgG antibody against Haemophilus influenzae B polysaccharide.
HIV infects cells with CD4, including monocyte/macrophages, and some T cells, including TH1, TH2, and TReg...
HIV infects cells with CD4, including monocyte/macrophages, and some T cells, including TH1, TH2, and TReg cells. Briefly discuss the immune function of 2 of these cell types (monocyte/ macrophages is one type only).
HIV infects a type of white T-Cell called a CD4. What is the range of a...
HIV infects a type of white T-Cell called a CD4. What is the range of a normal count for this blood cell? Classifying HIV into one of 5 stages is part of the case definition. Identify the stages and indicate what the CD4 count is for ages 6 and older in each stage. What does it mean to have a stage that is ‘unknown’? What does a viral load test measure? Define Epidemiology.           List the basic modes of transmission...
Which of the following are antigen-presenting cells? Macrophages B cells Cytotoxic T cells All of these...
Which of the following are antigen-presenting cells? Macrophages B cells Cytotoxic T cells All of these choices are correct answers. Only the first and second choices are correct answers.
There are different types of T cells, including CD4+ and CD8+ T cells. What types of...
There are different types of T cells, including CD4+ and CD8+ T cells. What types of T cells are CAR T cells? What will occur when these CAR T cells encounter their target cells? I believe both types of T cells are CAR T cells but what do they do in CAR T response.
what are the effector mechanisms of CD4 and CD8 T cells?
what are the effector mechanisms of CD4 and CD8 T cells?
Leukotrienes are released by macrophages that release prostaglandins. Histamine is released by platelets and mast cells...
Leukotrienes are released by macrophages that release prostaglandins. Histamine is released by platelets and mast cells when exposed to complement proteind C3a or C35.   8. For each of signs, suggest a factor that might be mediating that response during inflammation: a. hot to the touch b. redness Fever is an innate immune response like inflammation, however it may cause malaise, body aches and tiredness. First understand something about how the brain regulates body temperature. So be able to diagram how...
7.) Type of presentation complex found only on macrophages, dendritic cells, and B cells. A. Antigen...
7.) Type of presentation complex found only on macrophages, dendritic cells, and B cells. A. Antigen B. Epitope C. MHC I D. MHC II 8.) Cells that mass produce and release antibodies. A. neutrophils B. plasma cells C. natural killer cells D. macrophages 9.) Destruction of immune cells that respond to self. A. opsonization B. memory C. tolerance D. clonal selection 10.) Which class of vaccine consists of a whole pathogen that is killed or inactivated with heat, chemicals, or...
describe how B-cells and T-cells get activated in the adaptive immune response.
describe how B-cells and T-cells get activated in the adaptive immune response.
Explain the role(s) of the activated T cells and molecular effectors. Explain cell-cell interactions and resulting...
Explain the role(s) of the activated T cells and molecular effectors. Explain cell-cell interactions and resulting cytokine/chemokine production.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT