Using the figure shown below, briefly explain the relationship between levels of HIV viral RNA, levels of CD4+ T cells, and health of the infected human.

Consider the events that occur in HIV infection. I. HIV undergoes molecular self assembly.II. The protein gp120 binds to CD4.III. The HIV genome is incorporated into the host cell genome.IV. Reverse transcriptase is activated.V. The lipid envelope of HIV fuses with the T cell membrane. What is the correct sequence of the numbered events? I > III > V > IV > II IV > II > I > V > III II > V > IV > III > I III > I > II > IV > V

Give ONE example of how a defect in a T Reg cell could lead to an immunological disorder or disease.

Imagine a person is born with a genetic mutation, that suppresses the production of  MHC I markers. What problems would that create for this person?

Explain the reason that T-cells are so critical in recognizing and destroying virally-infected host cells.

How can an extracellular bacterium and an intracellular virus independently be targeted by a particular T cell response? And what is the mechanism of antigen presentation?

Describe the differences in how an antigen presenting cells (APC) activate a Helper T versus a Cytotoxic T cell.

Please help

Match the type or cause of clonal expansion with the correct situation. Use each choice just one time and make the best match.                                                  Clonal expansion of B cells because the cells are infected with EBV                                                  Clonal expansion of B-cells because these B-cells have B Cell Receptors that recognize a non-self antigen                                                  Clonal expansion of T-cells that have a T Cell Receptor that recognizes EBV antigens A. normal adaptive response by the B cells B. part of pathogenesis of mono C. This allows the adaptive immune system to shut down active EBV infection

If you come down with the flu, your body will launch an immune attack against the flu virus. During the recognition phase of the adaptive immune response: a   an antigen of the virus will be presented by an antigen-presenting cell and be recognized by T-helper cells b   B cells will recognize the viral particles and produce antibodies against them c   cytotoxic T cells will recognize the virus-infected cells and kill them d   antibodies will recognize the viral antigens, bind to them, and attract phagocytes e   a T-helper cell will recognize the viral antigen and stimulate B cells and cytotoxic T cells to divide