Which type of immunity is present at birth and defends against a broad range of pathogens?

(a) Adaptive immunity
(b) Innate immunity (CORRECT)
(c) Humoral immunity
(d) Cell-mediated immunity

Antibodies are produced by which type of immune cell?

(a) Phagocytes
(b) Macrophages
(c) Dendritic cells
(d) B lymphocytes (CORRECT)

Which antibody is the most abundant and best suited for preventing reinfection?

(a) IgM
(b) IgA
(c) IgG (CORRECT)
(d) IgE

Which molecule helps activate the complement system, a part of the innate immune response?

(a) Interferon
(b) Interleukin
(c) Histamine
(d) Antibody fragment (CORRECT)

Memory T cells are important for:

(a) Phagocytosis of pathogens
(b) Production of antibodies
(c) Rapid response to a previously encountered antigen (CORRECT)
(d) Activation of the complement system