Which of the following components of the immune system is responsible for the secretion of lymphokines?
**Core Concept**
The immune system comprises various cells and proteins that work together to defend against pathogens. **Lymphocytes**, a type of white blood cell, play a crucial role in this process. **Lymphokines**, also known as cytokines, are signaling molecules that facilitate communication between immune cells.
**Why the Correct Answer is Right**
**T lymphocytes** (T cells) are responsible for secreting lymphokines. These cells recognize antigens and trigger an immune response by releasing cytokines, which activate other immune cells, such as **B cells** and **macrophages**. This process involves the activation of specific **receptors** and **signaling pathways** that ultimately lead to the production of lymphokines.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because **neutrophils** are primarily involved in phagocytosis and the innate immune response.
**Option B:** Incorrect because **eosinophils** play a key role in fighting parasitic infections and in allergic reactions.
**Option D:** Incorrect because **basophils** are involved in inflammation and allergic responses, but not primarily in lymphokine secretion.
**Clinical Pearl / High-Yield Fact**
Remember that **T helper 1 (Th1) cells** and **T helper 2 (Th2) cells** are subsets of T lymphocytes that secrete different types of lymphokines, which determine the nature of the immune response.
**Correct Answer:** C. T lymphocytes.