Open Question
Binding of antigens to receptors of immunocompetent lymphocytes leads to clonal selection. Describe the process of clonal selection. What nonlymphocyte cell is a central actor in this process, and what is its function?
21. The Immune System
Introduction to Adaptive Immunity
Back21. The Immune System
Introduction to Adaptive Immunity
- Open QuestionMultiple ChoiceMore than one choice may apply.Which of the following antibody capabilities causes a transfusion reaction with A or B erythrocyte antigens?a. Neutralizationb. Precipitationc. Complement fixationd. Agglutination
- Multiple ChoiceWhich of the following statements is characteristic of a secondary humoral response?
- Multiple ChoiceA vaccination works to establish __________.
- Multiple ChoiceWhich of the following is NOT a mechanism of antibody action?
- Multiple ChoiceWhich of the following is a characteristic of a secondary immune response?
- Open QuestionWhich of the following is not involved in the activation of a B cell?a. antigen,b. helper T cell,c. cytokine,d. cytotoxic T cell.
- Open Question
Terrence has severe asthma and allergies, and is placed on a medication that blocks the functioning of IgE. How would this medication alleviate his symptoms?
- Multiple ChoiceHumoral immunity is provided by __________.
- Open QuestionTed finds out that he has been exposed to measles. He is concerned that he might have contracted the disease, so he goes to see his physician. The physician takes a blood sample and sends it to a lab for antibody levels and titers. The results show an elevated level and activity of IgM antibodies to rubella (measles) virus but very few IgG antibodies to the virus. Has Ted contracted the disease?
- Multiple Choice
The secondary lymphoid organs:
- Open QuestionMultiple ChoiceMore than one choice may apply.Which of these antibody classes is usually arranged as a pentamer?a. IgGb. IgMc IgAd. IgD
- Multiple Choice
T cells and B cells are produced in the:
- Open QuestionDefine antibody. Using an appropriately labeled diagram, describe the structure of an antibody monomer. Indicate and label variable and constant regions, heavy and light chains.
- Open Question
Match the following antibodies with the correct definition.
____IgD
____IgM
____IgG
____IgA
____IgE
a. Antibody found in secretions
b. Most common antibody; crosses the placenta
c. Antibody involved in allergies and parasitic infections
d. Pentamer and potent agglutinating agent
e. Antibody bound to the B cell plasma membrane