Fish Immunology

Which of the following is a characteristic of innate immunity?

• Slow response but long-lasting memory

• Highly specific to pathogens

• Involves physical barriers, phagocytes, and complement proteins

• Only found in mammals

Adaptive immunity differs from innate immunity because:

• It provides a rapid first-line defense

• It has immunological memory

• It includes mucus, skin, and antimicrobial peptides

• It does not involve B and T cells

Which of the following is an example of specific immunity?

• Mucus trapping pathogens

• Skin acting as a physical barrier

• Antibodies binding to a specific antigen

• Lysozyme breaking down bacterial cell walls

Non-specific immunity refers to:

• Immune response targeted at a specific pathogen

• A broad response that does not require prior exposure

• The production of antibodies by B cells

• A delayed response that takes days to activate

The main site of blood cell production (hematopoiesis) in fish is:

• Bone Marrow

• Spleen

• Head Kidney

• Liver

Why is the spleen considered a secondary lymphoid organ?

• It produces immune cells

• It stores and activates mature lymphocytes

• It acts as a physical barrier against pathogens

• It secretes antimicrobial peptides