Question

how do antigens elicit an immune response? select all that apply a first, they are engulfed by a leukocyte the recognizes the antigen. b first, they are recognized by receptors on immune system cells. c second, an immune response is tailored to the specific antigen. d second, they are destroyed by specific degradative proteins inside white blood cells.

Explanation:

Antigens first interact with immune - system cell receptors. Once recognized, the immune system mounts a specific response. Engulfment by a leukocyte is not the first step in the general immune - response process to an antigen. Also, destruction by degradative proteins inside white blood cells is not the typical second - step description for the overall immune response to an antigen.

Answer:

B. First, they are recognized by receptors on immune system cells., C. Second, an immune response is tailored to the specific antigen.