Nokea
A patient is responding to a microbial invasion and the patients differentiated lymphocytes have begun to function in either a humoral or a cellular capacity. During what stage of the immune response does this occur?
- A. The recognition stage
- B. The effector stage
- C. The response stage
- D. The proliferation stage
Correct Answer: C
Rationale: In the response stage, the differentiated lymphocytes function in either a humoral or a cellular capacity. In the effector stage, either the antibody of the humoral response or the cytotoxic (killer) T cell of the cellular response reaches and connects with the antigen on the surface of the foreign invader. In the recognition stage, the recognition of antigens as foreign, or non-self, by the immune system is the initiating event in any immune response. During the proliferation stage the circulating lymphocytes containing the antigenic message return to the nearest lymph node.
You may also like to solve these questions
A patient with cystic fibrosis has received a double lung transplant and is now experiencing signs of rejection. What is the immune response that predominates in this situation?
- A. Humoral
- B. Nonspecific
- C. Cellular
- D. Mitigated
Correct Answer: C
Rationale: Most immune responses to antigens involve both humoral and cellular responses, although only one predominates. During transplantation rejection, the cellular response predominates over the humoral response. Neither a mitigated nor nonspecific cell response is noted in this situation.
The nurse is assessing a clients risk for impaired immune function. What assessment finding should the nurse identify as a risk factor for decreased immunity?
- A. The patient takes a beta blocker for the treatment of hypertension.
- B. The patient is under significant psychosocial stress.
- C. The patient had a pulmonary embolism 18 months ago.
- D. The patient has a family history of breast cancer.
Correct Answer: B
Rationale: Stress is a psychoneuroimmunologic factor that is known to depress the immune response. Use of beta blockers, a family history of cancer, and a prior PE are significant assessment findings, but none represents an immediate threat to immune function.
A woman has been diagnosed with breast cancer and is being treated aggressively with a chemotherapeutic regimen. As a result of this regimen, she has an inability to fight infection due to the fact that her bone marrow is unable to produce a sufficient amount of what?
- A. Lymphocytes
- B. Cytoblasts
- C. Antibodies
- D. Capillaries
Correct Answer: A
Rationale: The white blood cells involved in immunity (including lymphocytes) are produced in the bone marrow. Cytoblasts are the protoplasm of the cell outside the nucleus. Antibodies are produced by lymphocytes, but not in the bone marrow. Capillaries are small blood vessels.
A nurse is explaining how the humoral and cellular immune responses should be seen as interacting parts of the broader immune system rather than as independent and unrelated processes. What aspect of immune function best demonstrates this?
- A. The movement of B cells in and out of lymph nodes
- B. The interactions that occur between T cells and B cells
- C. The differentiation between different types of T cells
- D. The universal role of the complement system
Correct Answer: B
Rationale: T cells interact closely with B cells, indicating that humoral and cellular immune responses are not separate, unrelated processes, but rather branches of the immune response that interact. Movement of B cells does not clearly show the presence of a unified immune system. The differentiation between types of T cells and the role of the complement system do not directly suggest a single immune system.
A man was scratched by an old tool and developed a virulent staphylococcus infection. In the course of the mans immune response, circulating lymphocytes containing the antigenic message returned to the nearest lymph node. During what stage of the immune response did this occur?
- A. Recognition stage
- B. Proliferation stage
- C. Response stage
- D. Effector stage
Correct Answer: B
Rationale: The recognition stage of antigens as foreign by the immune system is the initiating event in any immune response. The body must first recognize invaders as foreign before it can react to them. In the proliferation stage, the circulating lymphocyte containing the antigenic message returns to the nearest lymph node. Once in the node, the sensitized lymphocyte stimulates some of the resident dormant T and B lymphocytes to enlarge, divide, and proliferate. In the response stage, the differentiated lymphocytes function either in a humoral or a cellular capacity. In the effector stage, either the antibody of the humoral response or the cytotoxic (killer) T cell of the cellular response reaches and connects with the antigen on the surface of the foreign invader.