Answer :
Final answer:
During a primary adaptive immune response, T-cell responses include activation and differentiation, proliferation and expansion, and the formation of memory cells. The (C) release of antibodies is not a function of T-cells, but rather B-cells.
Explanation:
An important feature of the adaptive immune response is immunological memory, and a key player in this process is the T-cell.
During a primary adaptive immune response, T-cells undergo several crucial steps, with all but one applying:
- Activation and differentiation: Naïve T-cells are activated by antigens presented to them by antigen-presenting cells (APCs), leading to their differentiation into effector and memory T-cells.
- Proliferation and expansion: Once activated, T-cells rapidly divide and expand in number to fight the invading pathogen effectively.
- Release of antibodies: This is the incorrect choice as T-cells do not release antibodies; that is the role of B-cells, which differentiate into plasma cells that produce antibodies.
- Formation of memory cells: As T-cells differentiate, some become memory T-cells which persist for long periods and can respond quickly upon re-exposure to the same antigen.
Therefore, the correct responses of T-cells during a primary adaptive immune response are activation and differentiation, proliferation and expansion, and the formation of memory cells, but not the release of antibodies.
