Which of the following statements concerning antigen-presenting cells is true?
What is the correct sequence of events for activation of a B cell by a T-dependent antigen?
If a patient has been exposed to an antigen for the first time, which class of immunoglobulin appears first?
HIV directly infects T-cells. Why is this problematic for cell-mediated immunity?
How do helper T-cells and cytotoxic T-cells work together?
Which of the following statements concerning cellular immunity is FALSE?
An individual may be exposed to a pathogen and become infected without actually getting sick. This is known as a subclinical infection. Even in subclinical infections, the individual's adaptive immune system can generate memory for the pathogen. What type of adaptive immunity is this?
What is a feature of the small fragments presented by MHC-I proteins?
Which organelle assists directly with the presentation of MHC-I antigens?
When does MHC-II loading occur?
What is the fate of activated cytotoxic T-cells?
Which event happens first during cytotoxic T-cell activation?
Which receptor on the helper T-cell recognizes the specific antigen from an antigen-presenting cell?
Newborns' immunity due to the transfer of antibodies across the placenta is an example of
Which of the following statements is NOT a possible outcome of antigen-antibody reaction?
Which of the following is NOT a characteristic of B cells?
The variable region of the antibody is solely responsible the significant diversity of antigen targets.
Cytokines are protein-based chemical messengers that allow for communication between cells of the immune system.
Which of the following statements about natural killer cells is FALSE?
Which of the following bacterial components would most likely result in B cell stimulation by T-independent antigens?
Which of the following statements is FALSE?
Which of the following is the best definition of antigen?
The following events elicit an antibody response. What is the third step?