Open Question
Differentiate between humoral and cellular adaptive immunity.
21. The Immune System
Antigens
Back21. The Immune System
Antigens
- Open Question
Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
b. The immune response to a viral infection involves NK cells and different kinds of lymphocytes.
- Open QuestionCD4 markers are associated with (a) cytotoxic T cells, (b) regulatory T cells, (c) helper T cells, (d) all of these.
- Multiple ChoiceSelf-reactive B cells are eliminated in the __________.
- Open Question
Type I hypersensitivity is due to release of inflammatory mediators from_____, and type IV hypersensitivity is due to the actions of_____.
a. TH cells; macrophages
b. neutrophils; TH cells
c. B cells; TC cells
d. mast cells; TH cells
- Multiple ChoiceWhich type of disease results from the inability of the immune system to distinguish self- from nonself-antigens?
- Open QuestionLymphocytes that develop immunocompetence in the bone marrow area. T lymphocytes,b. B lymphocytes,c. NK cells,d. B and T lymphocytes.
- Open Question
Mark the following statements as true or false. If a statement is false, correct is to make a true statement.
a. In the primary immune response, the lag phase lasts about 5 days, during which time B cells proliferate and differentiate.
- Multiple Choice
Epitopes are:
- Multiple Choice__________ are substances that can trigger the adaptive defenses and provoke an immune response.
- Open Question
Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
d. Cancer cells are destroyed by NK cells, TC cells, and macrophages.
- Open QuestionGive a function for each of the following: (a) cytotoxic T cells, (b) helper T cells, (c) regulatory T cells, (d) plasma cells,(e) NK cells,
- Open QuestionDefine immunocompetence and self-tolerance. How is self-tolerance achieved?
- Open Question
Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
e. Dendritic cells may activate both TH and TC cells.
- Multiple Choice
Many phagocytic immune cells such as macrophages and dendritic cells commonly engulf foreign or dangerous materials in the body. If these cells engulf antigens, the cells will present the antigens on their surface. Which immune cells will respond to these “presented” antigens and trigger an immune response if necessary?