After the clearance of foreign antigen, the expanded effector T-cell population __ a. dies by apoptosis b. Increases in size C. remains in the circulatory system d. remains in lymph nodes Clear my choice

fter the clearance of foreign antigen, the expanded effector T-cell population __<br /><br />a. dies by apoptosis<br /><br />b. Increases in size<br /><br />c. remains in the circulatory system<br /><br />d. remains in lymph nodes<br /><br />The correct answer is:<br /><br />a. dies by apoptosis<br /><br />After the clearance of foreign antigen, the expanded effector T-cell population dies by apoptosis. This process is crucial for the immune system to eliminate the effector T-cells that have performed their function of eliminating the foreign antigen. This helps to prevent an excessive immune response and maintain homeostasis in the immune system.