Ace A Level Biology 2026 – Dive Deep and Conquer Science!

B memory cells play a crucial role in the immune system's ability to remember past infections. Their primary function is to provide long-term immunological memory. When the body encounters a pathogen for the first time, B cells are activated, and some of these cells differentiate into memory B cells. These memory cells persist in the body for years or even decades after the initial exposure.

In the event of a subsequent encounter with the same pathogen, memory B cells quickly recognize the antigens and respond more rapidly and effectively than during the first exposure. This means that the body can mount a stronger and faster immune response, helping to prevent illness or reduce its severity. Thus, their key function is not just immediate action but ensuring long-lasting protection by 'remembering' specific pathogens for future encounters.