Question

question 8
1 pts
the first line of cellular defense against pathogens are the
b lymphocytes.
plasma cells.
nk cells.
phagocytes.
t lymphocytes.

Explanation:

To determine the first line of cellular defense against pathogens, we analyze each option:

• B lymphocytes: Involved in humoral immunity (antibody production), not the first line of cellular defense.
• Plasma cells: Produce antibodies, part of humoral response, not first-line cellular defense.
• NK cells: Involved in innate immunity but target infected/cancerous cells, not the first line of defense against pathogens generally.
• Phagocytes (e.g., macrophages, neutrophils): They engulf and destroy pathogens, acting as the first line of cellular defense by directly attacking invaders.
• T lymphocytes: Involved in cell - mediated immunity, not the first line of cellular defense.

Answer:

phagocytes (the option with "phagocytes" text)