Which type of T cell is responsible for enhancing the activity of other immune cells during the immune response?
Cytotoxic T cells
Memory T cells
Helper T cells
Suppressor T cells
The Correct Answer is C
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Explanation:Destroying infected cells. Antibodies are produced by B cells in response to a specific pathogen and play a crucial role in identifying and neutralizing the invading pathogens, including infected cells.
Incorrect choices:
b. Attracting white blood cells to the site of infection is not the primary role of antibodies. White blood cells are attracted to the site of infection by chemical signals released by damaged tissues or pathogens.
c. Antibodies do not produce hormones. Hormones are chemical messengers produced by endocrine glands to regulate various bodily functions.
d. Antibodies do not regulate body temperature. Body temperature regulation is mainly controlled by the hypothalamus in the brain.
Correct Answer is A
Explanation
Explanation: Antigens are unique molecules or proteins present on the surface of cells, including pathogens. The immune system can recognize these antigens as "non-self" and mount an immune response to eliminate them while sparing the body's own cells, which display different antigens that are recognized as "self."
Incorrect choices:
b. Recognizing different blood types is relevant for blood transfusions but not a primary mechanism of distinguishing self from non-self by the immune system.
c. Monitoring hormone levels in the body is not directly related to the immune system's ability to distinguish between self and non-self.
d. Cytokines are signaling molecules released by immune cells to regulate the immune response but are not the primary means of distinguishing self from non-self.
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