Question

why is the action of phagocytes considered a nonspecific response?
it does not occur at any specific temperature.
it is not involved with the production of any specific type of lymphocyte.
it does not respond to any specific type of hormone.
it is not a response to a specific type of pathogen.

Explanation:

To determine why phagocytes' action is nonspecific, recall: Nonspecific immune responses (like phagocytosis) act against a wide range of pathogens, not a single specific type.

• Option 1: Temperature is irrelevant to specificity of immune response. Eliminate.
• Option 2: Lymphocyte production is part of specific immunity; phagocytes are nonspecific, but this is not the core reason for their nonspecificity. Eliminate.
• Option 3: Hormone response is not the focus of immune specificity. Eliminate.
• Option 4: Phagocytes (e.g., macrophages, neutrophils) engulf and destroy various pathogens (not a specific one), so their response is nonspecific. This matches the definition of nonspecific immunity.

Answer:

D. It is not a response to a specific type of pathogen.