When naïve B cells are activated, they differentiate into:
a. Plasma cells
b. Memory cells
c. Both a and b
d. None of the above

Verified step by step guidance

1. Step 1: Understand the role of naïve B cells in the immune system. Naïve B cells are immature B cells that have not yet encountered their specific antigen. They play a critical role in adaptive immunity by producing antibodies when activated.
2. Step 2: Learn about the activation process of naïve B cells. Activation occurs when a naïve B cell binds to its specific antigen via its B-cell receptor (BCR) and receives additional signals from helper T cells. This triggers the differentiation process.
3. Step 3: Explore the differentiation pathways of activated B cells. Once activated, naïve B cells can differentiate into two main types of cells: plasma cells, which produce and secrete antibodies, and memory B cells, which persist in the body to provide long-term immunity.
4. Step 4: Analyze the options provided in the question. Option 'a' refers to plasma cells, option 'b' refers to memory cells, option 'c' refers to both plasma and memory cells, and option 'd' states none of the above.
5. Step 5: Based on the biological process of B cell activation and differentiation, determine which option correctly describes the outcome of naïve B cell activation. Remember that both plasma cells and memory cells are produced during this process.

Key Concepts

Naïve B Cells

Naïve B cells are a type of white blood cell that have not yet encountered their specific antigen. They circulate in the bloodstream and lymphatic system, ready to respond to pathogens. Upon activation by an antigen, they undergo differentiation, which is crucial for the adaptive immune response.

Differentiation of B Cells

Differentiation is the process by which naïve B cells transform into specialized cells after activation. This can lead to the formation of plasma cells, which produce antibodies, or memory B cells, which provide long-term immunity. Understanding this process is essential for grasping how the immune system adapts to infections.

Plasma Cells and Memory Cells

Plasma cells are the effector form of B cells that secrete large quantities of antibodies to neutralize pathogens. Memory cells, on the other hand, remain in the body after an infection has been cleared, allowing for a faster and more effective response upon re-exposure to the same antigen. Both cell types are critical for a robust immune response.