Which of the following statements about the secondary immune response is correct?
It is primarily mediated by IgM antibodies.
It occurs after the primary immune response and is slower.
Memory cells are not involved in the secondary immune response.
It provides long-lasting immunity due to the presence of memory cells.
The Correct Answer is D
Explanation: The secondary immune response provides long-lasting immunity because of the presence of memory B cells and memory T cells. These memory cells "remember" the specific antigen and can quickly mount a strong and effective immune response upon re-exposure to the same antigen, providing long-term protection.
Incorrect choices:
a. The primary immune response is primarily mediated by IgM antibodies, while the secondary immune response involves the predominance of IgG antibodies, which are more effective and provide long-lasting immunity.
b. The secondary immune response occurs after the primary immune response and is faster, not slower, due to the presence of memory cells.
c. Memory cells are a key component of the secondary immune response, playing a central role in providing rapid and robust immunity.
VI. Immune Disorders and Clinical Considerations:
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Correct answer: B
Explanation: T cells, specifically cytotoxic T cells (CD8+ T cells), are responsible for cell-mediated immunity. They directly recognize and attack infected or abnormal cells, leading to their destruction. This process is crucial in controlling viral infections and cancer cells.
Incorrect choices:
a. B cells, not T cells, are responsible for the production of antibodies during the humoral immune response.
c. Phagocytosis of pathogens is mainly carried out by macrophages and neutrophils, not T cells.
d. Allergic reactions are primarily mediated by a different type of T cells called helper T cells (CD4+ T cells), not cytotoxic T cells.
Correct Answer is C
Explanation
Explanation: Helper T cells (CD4+ T cells) play a critical role in the immune response by enhancing the activity of other immune cells. They secrete cytokines that stimulate B cells to produce antibodies, activate cytotoxic T cells to kill infected cells, and promote the function of macrophages in phagocytosis. Helper T cells are essential for coordinating and regulating the immune response.
Incorrect choices:
a. Cytotoxic T cells (CD8+ T cells) are responsible for directly attacking and killing infected cells, not enhancing the activity of other immune cells.
b. Memory T cells are formed after the immune system encounters an antigen and are not directly involved in enhancing immune cell activity.
d. Suppressor T cells (regulatory T cells) are involved in down-regulating the immune response to prevent excessive inflammation and tissue damage, not in enhancing immune cell activity.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.