Which describes what the body does to prevent and control infections?

Which describes what the body does to prevent and control infections?

• A. Defending against allergy
• B. Preventing and controlling infections
• C. Promoting infection
• D. Spreading disease

Answer: (B)

The body's defenses use barriers and immune responses to prevent and control infections. The skin and mucous membranes form the first line of protection by blocking pathogen entry, while chemical barriers like sweat, oils, stomach acid, and enzymes in saliva and tears help destroy or wash away microbes. If invaders get through, immune cells such as white blood cells identify and attack them, antibodies neutralize specific germs, and inflammation brings more defenders to the area to contain and repair. Fever can also help by slowing pathogen growth and boosting immune activity. Vaccines train the immune system to respond more quickly in future infections. In practice, this concept highlights how the body’s natural defenses work alongside good hygiene and sanitation to prevent and control infections, making the description of these protective processes the best choice.

The body's defenses use barriers and immune responses to prevent and control infections. The skin and mucous membranes form the first line of protection by blocking pathogen entry, while chemical barriers like sweat, oils, stomach acid, and enzymes in saliva and tears help destroy or wash away microbes. If invaders get through, immune cells such as white blood cells identify and attack them, antibodies neutralize specific germs, and inflammation brings more defenders to the area to contain and repair. Fever can also help by slowing pathogen growth and boosting immune activity. Vaccines train the immune system to respond more quickly in future infections. In practice, this concept highlights how the body’s natural defenses work alongside good hygiene and sanitation to prevent and control infections, making the description of these protective processes the best choice.