What is the role of plasma cells?
They engulf pathogens in the blood
They remain latent in the body, and wait for reinfection in order to release antibodies
They present antigens from the blood to helper T-cells for identification
They cause inflammation by secreting plasma-like fluid
They release free antibodies into the blood
Which of the following cells plays a key role in both humoral and cell-mediated immunity?
Basophil
Helper T-cell
Memory B-cell
Cytotoxic T-cell
Plasma cell
