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