Acquired Immunity
Pathogen-specific immunity developed after exposure, characterized by memory and responsiveness to subsequent encounters.
What is Acquired Immunity?
A foreign substance (like a part of a pathogen) that triggers an immune response.
Key points
- Define acquired immunity and its characteristics.
- Differentiate between innate and acquired immunity.
- Explain the concept of immunological memory.
- Describe the roles of B cells and T cells in acquired immunity.
Common exam trap
Confusing acquired immunity with innate immunity.
Definitions
- Term
Antigen
- Meaning
A foreign substance (like a part of a pathogen) that triggers an immune response.
- Term
Antibody
- Meaning
A protein produced by B cells that specifically binds to an antigen, neutralizing it or marking it for destruction.
- Term
Immunological Memory
- Meaning
The ability of the immune system to remember previous encounters with specific antigens, leading to a faster and more effective response upon subsequent exposure.
- Term
Lymphocyte
- Meaning
A type of white blood cell that plays a key role in acquired immunity, including B cells and T cells.
Learning objectives
Define acquired immunity and its characteristics.
Differentiate between innate and acquired immunity.
Explain the concept of immunological memory.
Describe the roles of B cells and T cells in acquired immunity.
Understand the principle behind vaccination.
Prerequisites
Innate Immunity
Antigens and Antibodies
Cells of the Immune System (Lymphocytes)
Common mistakes
Confusing acquired immunity with innate immunity.
Underestimating the role of memory cells.
Not understanding the difference between primary and secondary immune responses.
Believing acquired immunity is present from birth.
Keywords
Acquired Immunity
Adaptive Immunity
Immunological Memory
B Cells
T Cells
Antigen
Antibody
Vaccination
Primary Response
Secondary Response
Humoral Immunity
Cell-mediated Immunity
Practice preview
Which type of lymphocytes are primarily responsible for cell-mediated immunity?…
easy
What type of immunity is responsible for the long-lasting protection provided by vaccines?…
easy
When a person is vaccinated, which component of the immune system is being stimulated to develop immunological memory?…
medium