Download test question answers

Answers to test questions :
Match the vocabulary words with the definition for numbers 1-10:
1. Innate Immunity: defense that is active immediately upon exposure to pathogens and that
is the same whether or not the pathogen has been encountered previously.
2. Class I MHCs: found on the surface of nearly all nucleated cells and that functions in
identification of infected cells by cytotoxic T ells.
3. Class II MHCs: restricted to a few specialized immune cell types (dendritic cells,
macrophages, and B cells) that serve as antigen-presenting cells.
4. B lymphocytes (B cells): that complete their development in the bone marrow and
become effector cells for the humoral immune response.
5. T lymphocytes (T cells): mature in the thymus and that includes both effector cells for the
cell-mediated immune response and helper cells required for both branches of adaptive
immunity.
6. Primary Immune Response: immune response to an antigen, which appears after a lag of
about 10 to 17 days.
7. Secondary Immune Response: immune response elicited on second or subsequent
exposures to a particular antigen.
8. Humoral Immune Response: immunity that involves the activation of B cells and that
leads to the production of antibodies, which defend against bacteria and viruses in body
fluids.
9. Cell-mediated immune response: immunity that involves the activation of cytotoxic T
cells, which defend against infected cells
10. Eosinophils: A type of white blood cell with low phagocytic activity that is thought to
play a role in defense against parasitic worms by releasing enzymes toxic to these
invaders.
Multiple Choice Questions:
11. An immune response to a specific antigen generates the production of a ________ cell to
launch and attack the next time that same antigen affects the body.
a. Effector cells
b. Memory cells
c. T cells
d. B cells
e. Antibodies
12. Which of the following is incorrectly paired?
a. Immunoglobins- glycoproteins that form epitome.
b. IgE- antibody molecules attached to mast cells.
c. Antibodies- B cells.
d. Cytokines- helper T cells.
13. Which of the following are lines of defenses?
a. Skin and mucus membranes.
b. Non-specific internal defenses.
c. Immune response.
d. All of the above.
14. The ___________ destroys the target cell through phagocytosis.
a. Neutrophil
b. Eosinophil
c. Plasma cells
d. Dentic cells
15. B cells and T cells work together to
a. Circulate through blood and lymph.
b. Recognize particular microbes.
c. Respond to subsequent infections.
d. Both a and b.
16. There are four stages of the lymphatic system in innate defenses. What is the first step of
lymph flow?
a. Lymphatic vessels return to the blood via two large ducts that drain into veins
near the shoulder.
b. Interstitial fluid bathing the tissues, along with the white blood cells in it,
continually enters lymphatic vessels.
c. Lymph flows through lymphatic vessels throughout the body
d. Foreign particles present in the circulating lymph encounters macrophages.
17. Class II of the MHC molecules are recognized by which T cell?
a. Helper cell
b. Antigen presenting cells
c. Cytotoxic cells
d. Both a and b
18. Which of the following cells bear receptors specific for antigen?
a. Effector cells
b. Memory cells
c. Clonal selection
d. Helper cell
19. Humoral immune system includes…
a. The activation of effector B cells
b. The clonal of effector B cells
c. Activation of Cytotoxic T cells
d. Both a and b
e. All of the above
20. What are preventions of rejection?
a. Autografts
b. Isigrafts
c. Allografts
d. Xenografts
e. All of the above