Which group of substances produced in tissue help maximize the white blood cell response against bacteria and can cause fever?

Which group of substances produced in tissue help maximize the white blood cell response against bacteria and can cause fever?

• A. Interleukins
• B. Prostaglandins
• C. Leukotrienes
• D. Cytokines

Answer: (A)

Signals that coordinate and amplify the immune response are cytokines, small proteins released by cells in tissues during inflammation. Among these, interleukins are produced by leukocytes and other cells to regulate white blood cell activity. They help recruit and activate neutrophils and other WBCs, enhancing their ability to fight bacteria. Some interleukins also act as fever-inducing pyrogens, signaling the brain to raise body temperature. This combination—boosting the white blood cell response and potentially causing fever—makes interleukins the best match. Prostaglandins are lipid mediators that can trigger fever and contribute to inflammation but don’t primarily maximize WBC response. Leukotrienes drive inflammation and chemotaxis but aren’t the main group that directly enhances WBC activity. Cytokines is a broader category that includes interleukins, but the question points to the specific group most involved in regulating leukocytes and fever, which is interleukins.

Signals that coordinate and amplify the immune response are cytokines, small proteins released by cells in tissues during inflammation. Among these, interleukins are produced by leukocytes and other cells to regulate white blood cell activity. They help recruit and activate neutrophils and other WBCs, enhancing their ability to fight bacteria. Some interleukins also act as fever-inducing pyrogens, signaling the brain to raise body temperature. This combination—boosting the white blood cell response and potentially causing fever—makes interleukins the best match. Prostaglandins are lipid mediators that can trigger fever and contribute to inflammation but don’t primarily maximize WBC response. Leukotrienes drive inflammation and chemotaxis but aren’t the main group that directly enhances WBC activity. Cytokines is a broader category that includes interleukins, but the question points to the specific group most involved in regulating leukocytes and fever, which is interleukins.