CMLA Immunology & Serology

Question 1

What type of immunity is acquired through vaccination?

Accepted Answer

Artificial active immunity

Answer

Natural passive immunity

Answer

Natural active immunity

Answer

Artificial passive immunity

Question 2

Which immunoglobulin is the most abundant in serum and provides long-term immunity?

Accepted Answer

IgG

Answer

IgM

Answer

IgA

Answer

IgE

Question 3

Which complement pathway is activated by antigen-antibody (immune) complexes?

Accepted Answer

Classical pathway

Answer

Alternative pathway

Answer

Lectin pathway

Answer

Properdin pathway

Question 4

What is the primary function of B lymphocytes in the immune response?

Accepted Answer

Antibody (immunoglobulin) production

Answer

Direct cytotoxic cell killing

Answer

Phagocytosis of pathogens

Answer

Regulation of T cell activity

Question 5

Which type of hypersensitivity reaction is mediated by IgE antibodies and occurs immediately upon antigen exposure?

Accepted Answer

Type I (anaphylactic)

Answer

Type II (cytotoxic)

Answer

Type III (immune complex)

Answer

Type IV (delayed)

Question 6

Which immunoglobulin is the first to be produced during a primary immune response?

Accepted Answer

IgM

Answer

IgG

Answer

IgA

Answer

IgD

Question 7

An antigen is best defined as a substance that:

Accepted Answer

Stimulates an immune response and binds specifically to antibodies

Answer

Is produced by plasma cells to neutralize pathogens

Answer

Activates phagocytes to engulf foreign material

Answer

Provides non-specific innate immune defense