Biology of Disease

QUESTIONS

1. Which of the following is NOT part of the nonspecific defense against
   invading microorganisms?

a) skin;

b) mucus;

c) antibodies;

d) lysozyme;

e) lactic acid.

2. Which of the following is NOT found in the blood?

a) macrophage;

b) monocyte;

c) neutrophil;

d) small lymphocyte;

e) large granular lymphocyte.

3. Which of the following statements best describes complement?

a) a defense protein found in sweat;

b) a group of proteins which results in the lysis of bacteria;

c) a cytokine produced by macrophages;

d) an antibody which lyses bacteria;

e) a protein found in the cell wall of bacteria.

4. Pair up the cells in column one with the appropriate cell surface
   molecule in column two.

Column 1 Column 2

a) All mature T lymphocytes 1) CD4

b) All B lymphocytes 2) CD8

c) Macrophages 3) CD3

d) Helper T lymphocytes 4) Surface immunoglobulin

e) Cytotoxic T lymphocytes 5) Receptors for complement

5. Which immunoglobulin class in each case best fits the following
   description?

a) the only antibody that crosses the placenta;

b) the most abundant antibody in the blood;

c) also known as the secretory antibody;

d) produced in response to parasitic worms;

e) the antibody with the largest Mr.

6. Why is it unnecessary for erythrocytes to have MHC encoded Class I
   proteins?

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