Analyze how the three key components of cell communication interact to mount an immune response.

• A. Cytokines act alone in signaling immune responses.
• B. All components independently mount an immune response without interaction.
• C. Cell surface receptors destroy pathogens, while the other components are not involved.
• D. Cell surface receptors detect threats, adhesion molecules facilitate cell interactions, and cytokines signal other immune components.

Answer: (D)