GED Science TestLife ScienceMedium
A patient is undergoing treatment for a chronic autoimmune disease where their immune system mistakenly attacks healthy tissues. The physician prescribes a medication that specifically targets and suppresses the activity of T-lymphocytes. What is the most likely intended effect of this medication?
- ATo increase the production of antibodies against bacterial infections.
- BTo stimulate the rapid proliferation of B-lymphocytes.
- CTo directly destroy cancerous cells throughout the body.
- DTo reduce the immune system's attack on the body's own tissues.
Show answer & explanationAnswer & explanation
Correct answer: D. To reduce the immune system's attack on the body's own tissues.
T-lymphocytes (T cells) are central to cell-mediated immunity and play a crucial role in autoimmune diseases by orchestrating attacks on self-tissues. Suppressing their activity directly aims to reduce this harmful autoimmune response, thus mitigating the disease's effects.
Why the other options are wrong
- A. Antibody production is primarily a function of B-lymphocytes, not T-lymphocytes.
- B. Suppressing T-lymphocytes would not typically stimulate B-lymphocyte proliferation; T cells often *help* B cells in their activation.
- C. While some T cells (cytotoxic T cells) can kill cancerous cells, the primary goal in autoimmune disease treatment is not cancer destruction but reducing self-attack.
T-lymphocyte Suppression in Autoimmunity
T-lymphocytes (T cells) are key components of the adaptive immune system, responsible for cell-mediated immunity. In autoimmune diseases, they mistakenly target and attack healthy self-tissues. Medications suppressing T-cell activity aim to reduce this self-destructive response.
- T cells are central to cell-mediated immunity.
- In autoimmune diseases, T cells attack self-antigens.
- Suppression of T-cell activity reduces inflammation and tissue damage.
- Often used in transplant patients to prevent rejection and in autoimmune conditions.
Memory trick: T-cells are attackers; suppress them to stop the self-attack!