NIC Cosmetology Written (Theory) ExamScientific ConceptsHard
Which type of immunity is developed after the body is exposed to a pathogen and produces its own antibodies?
- ANatural active immunity
- BNatural passive immunity
- CArtificial active immunity
- DArtificial passive immunity
Show answer & explanationAnswer & explanation
Correct answer: A. Natural active immunity
Natural active immunity occurs when a person is naturally exposed to a pathogen (e.g., gets sick with the flu) and their immune system responds by producing antibodies and memory cells. This provides long-lasting protection against future infections by the same pathogen.
Why the other options are wrong
- B. Natural passive immunity involves receiving pre-formed antibodies from a natural source (e.g., mother to child through placenta or breast milk), not producing one's own.
- C. Artificial active immunity is developed through vaccination, where a weakened or inactive pathogen is introduced to stimulate antibody production, but the question specifies 'exposed to a pathogen' in a natural context.
- D. Artificial passive immunity involves receiving pre-formed antibodies from an external source (e.g., antiserum), not producing one's own.
Natural Active Immunity
Immunity developed when the body produces its own antibodies and memory cells after natural exposure to a pathogen.
- Results from recovering from an infection.
- Provides long-lasting protection.
- Body actively participates in immune response.
Memory trick: Immunity's 'Active' or 'Passive' – 'Natural' or 'Artificial'!