Summary
Antibodies are proteins that play a crucial role in the immune system by binding to antigens and neutralizing pathogens. Vaccination involves introducing antigens to stimulate an immune response and provide long-lasting immunity.
- Antibodies — proteins that bind to antigens to neutralize pathogens.
Example: Immunoglobulins are antibodies with a quaternary structure. - Monoclonal Antibodies — identical antibodies produced from a single B cell clone.
Example: Used in cancer treatment to target specific cells. - Active Immunity — immunity developed after exposure to antigens.
Example: Vaccination induces active immunity by creating memory cells. - Passive Immunity — temporary immunity gained by receiving antibodies from another source.
Example: Newborns receive passive immunity through breast milk. - Live Attenuated Vaccine — contains weakened pathogens to stimulate a strong immune response.
Example: MMR vaccine for measles, mumps, and rubella. - Inactivated Vaccine — contains killed pathogens or fragments to induce immunity.
Example: Polio vaccine is an inactivated vaccine.
Exam Tips
Key Definitions to Remember
- Antibodies
- Monoclonal Antibodies
- Active Immunity
- Passive Immunity
- Live Attenuated Vaccine
- Inactivated Vaccine
Common Confusions
- Confusing active and passive immunity
- Misunderstanding the difference between live attenuated and inactivated vaccines
Typical Exam Questions
- What is the role of antibodies in the immune system? Antibodies bind to antigens to neutralize pathogens.
- How are monoclonal antibodies produced? They are produced using the hybridoma technique from a single B cell clone.
- What is the difference between active and passive immunity? Active immunity involves the body's own immune response, while passive immunity is acquired from another source.
What Examiners Usually Test
- Understanding of how vaccines work to provide immunity
- Differences between types of immunity and vaccines
- Applications of monoclonal antibodies in medicine