Biology, Eighth Edition (Raven)

Chapter 51: The Immune System

Pre Test

1
True or False: The skin is home to bacteria and fungi. All of these are potentially harmful. (p.1040)
A)True
B)False
2
Natural killer cells: (p. 1041)
A)attack invading microbes directly.
B)kill by phagocytosis.
C)are the most abundant of leukocytes.
D)kill cells of the body that have been infected with viruses.
E)none of the above
3
Antigens: (p 1045)
A)provoke specific immune responses.
B)may be large, complex proteins.
C)may be components of foods.
D)may have many different parts.
E)all of the above
4
In humans the major histocompatibility complex (or MHC): (p. 1049)
A)encodes human leukocyte antigen proteins.
B)is extremely polymorphic.
C)allows self versus non-self recognition.
D)all of the above
5
What are the B cell receptors for antigens? (p. 1051)
A)cytokines
B)interleukin
C)immunoglobulins
D)interferon
E)none of the above
6
True or False: It is impossible for the immune system to attack the animal's own tissues and cause death. (p. 1058)
A)True
B)False
7
The ABO blood group system: (p. 1060)
A)is determined by a gene with four alleles.
B)is a protein-sugar complex on the surface of a red blood cell.
C)causes agglutination of cells if different blood types are mixed.
D)is determined by the MHC.
E)both b and c
8
Why is the human influenza virus difficult for the body to combat? (p. 1063)
A)It attacks the body's immune system.
B)It alters its surface antigens regularly.
C)It is resistant to attack by T cells.
D)all of the above
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