Immuno_Ch1 & 2

Which of the following does NOT protect body surfaces?

• Skin

• Mucus

• Gastric acid

• Salivary amylase

Complement component C3 is cleaved by:

• C3b

• C3bBb

• Factor B

• Factor D

The membrane attack complex consists of:

• OH

• Colicins

• C3bBb3b

• C5b,6,7,8,9

Which of the following statements is TRUE of C3b?

• C3b is chemotactic for neutrophils

• C3b is an anaphylatoxin

• C3b opsonizes bacteria

• C3b directly injures bacteria

Which of the following statements is TRUE of lysozyme?

• Lysozyme is a cytoplasmic organelle

• Lysozyme activates complement

• Lysozyme is a proteolytic enzyme

• Lysozyme splits peptidoglycan

Polymorphonuclear neutrophils attack bacteria:

• Exclusively by oxygen-dependent mechanisms

• Exclusively by oxygen-independent mechanisms

• By phagocytosis

• By secreting complement

Which of the following is a complement component that is strongly chemotactic for neutrophils?

• C9

• C5a

• C3

• C3b

The formation of memory immune responses is the objective of vaccination. Immunological memory is predominantly the function of which of the following?

•  The complement system.

• Cells bearing pattern-recognition receptor molecules.

• Cells of the adaptive immune system.

• Molecules comprising the chemical barrier.

Progenitors of T cells originate in the bone marrow and travel to which organ to develop into mature T cells?

• Liver

• Lymph nodes

• Spleen

• Thymus

What is the correct sequence of events in the body’s response to a previously unencountered invading organism?

• Mucosal barrier, clonal immune expansion of lymphocytes, antibody production, innate immune cells, memory cell production

• Mucosal barrier, antibody production, clonal expansion of lymphocytes, innate immune cells, memory cell production

• Mucosal barrier, innate immune cells, clonal expansion of lymphocytes, antibody production, memory cell production

• Mucosal barrier, innate immune cells, antibody production, clonal expansion of lymphocytes, memory cell production