Immunity that is generated by an animal's immune system following exposure to a foreign antigen is referred to as:

Immunity that is generated by an animal's immune system following exposure to a foreign antigen is referred to as:

• A. Active immunity
• B. Passive immunity
• C. Colostral immunity
• D. Responsive immunity

Answer: (A)

Active immunity is immunity produced by the animal's own immune system in response to a foreign antigen. When the body encounters the antigen, B cells and T cells respond, antibodies are formed, and memory cells are created. This memory allows the animal to respond more quickly and effectively if the same antigen is encountered again, often providing long-lasting protection. This can happen naturally after infection or artificially through vaccination. In contrast, passive immunity involves receiving antibodies from another source, such as maternal antibodies transferred through colostrum or the placenta. It provides immediate protection but is short-lived and does not establish immune memory. Colostral immunity is a specific example of passive immunity acquired from the mother's colostrum. The idea of “responsive immunity” isn’t a standard term for this concept.

Active immunity is immunity produced by the animal's own immune system in response to a foreign antigen. When the body encounters the antigen, B cells and T cells respond, antibodies are formed, and memory cells are created. This memory allows the animal to respond more quickly and effectively if the same antigen is encountered again, often providing long-lasting protection. This can happen naturally after infection or artificially through vaccination.

In contrast, passive immunity involves receiving antibodies from another source, such as maternal antibodies transferred through colostrum or the placenta. It provides immediate protection but is short-lived and does not establish immune memory. Colostral immunity is a specific example of passive immunity acquired from the mother's colostrum. The idea of “responsive immunity” isn’t a standard term for this concept.