Question

9. Which type of cell engulfs pathogens? a) Macrophage b) B cell c) T cell d) Plasma cell
10. Which of these is NOT a physical barrier? a) Skin b) Mucus c) Stomach acid d) Antibody
11. Which immune cell destroys infected cells? a) Helper T cell b) Cytotoxic T cell c) B cell d)
Macrophage

Answer 1

9) a) Macrophage — macrophages phagocytose (engulf) pathogens.
10) d) Antibody — antibodies are immune molecules, not a physical barrier (skin, mucus, stomach acid are physical/chemical barriers).
11) b) Cytotoxic T cell — cytotoxic (CD8+) T cells kill infected cells.