Question 1
Leukocytes recognize molecules that are unique to pathogens; thus, the molecules are
◦ pathogen-associated molecular patterns.
◦ toll-like receptors.
◦ pattern recognition receptors.
◦ antigens.
◦ phagosomes.
Question 2
Chemical signals that attract immune cells are known as
◦ opsonins.
◦ interferons.
◦ lysozymes.
◦ chemotaxins.
◦ antigens.