If you catch a fever because your body is fighting something, which system is primarily involved?

If you catch a fever because your body is fighting something, which system is primarily involved?

• A. Immune System
• B. Nervous System
• C. Respiratory System
• D. Digestive System

Answer: (A)

Fever is part of the body's immune response to an infection. When germs are detected, immune cells release chemicals called pyrogens that travel to the brain. The hypothalamus raises the body's temperature, producing a fever. This higher temperature helps immune cells work more effectively and can slow the growth of some pathogens. So the system primarily involved is the immune system. The nervous system helps regulate the fever, but the actual battle against the invader and the fever itself come from the immune system. The digestive and respiratory systems have other roles, but they aren’t what primarily produces a fever.

Fever is part of the body's immune response to an infection. When germs are detected, immune cells release chemicals called pyrogens that travel to the brain. The hypothalamus raises the body's temperature, producing a fever. This higher temperature helps immune cells work more effectively and can slow the growth of some pathogens. So the system primarily involved is the immune system. The nervous system helps regulate the fever, but the actual battle against the invader and the fever itself come from the immune system. The digestive and respiratory systems have other roles, but they aren’t what primarily produces a fever.