Phys 3 EXAM NEWEST COMPLETE QUESTIONS AND
CORRECT DETAILED ANSWERS (VERIFIED
ANSWERS) |ALREADY GRADED A+
The immune system destroys or neutralizes:
A. bacteria.
B. viruses.
C. nonmicrobial foreign substances.
D. cancer cells that arise in the body.
E. All of the choices are correct - ✔✔ANSWER✔✔-E. All
of the choices are correct
Which is NOT true about viruses?
A. They consist of a nucleic acid surrounded by a
carbohydrate shell.
B. They require a host cell in order to reproduce
themselves.
C. They may reside in a host cell for years without killing it.
D. They may cause a host cell to become cancerous.
E. They may have genetic information in the form of RNA.
- ✔✔ANSWER✔✔-A. They consist of a nucleic acid
surrounded by a carbohydrate shell.
(protein shell is correct)
The killing of virus-infected or cancerous cells by the
immune system is called:
A. immune oversight.
B. immune surveillance.
,C. tissue immunity.
D. phagocytosis.
E. hemostasis. - ✔✔ANSWER✔✔-B. immune surveillance.
Which is TRUE regarding the immune system cells?
A. Plasma cells are derived from T cells.
B. Macrophages are derived from basophils.
C. Macrophages are derived from monocytes.
D. The immune cells found within the bloodstream are
called erythrocytes.
E. Neutrophils are classified as lymphoid cells. -
✔✔ANSWER✔✔-C. Macrophages are derived from
monocytes.
Which of the following statements about the immune
system is TRUE?
A. Neutrophils, basophils, eosinophils and monocytes
originate in bone marrow.
B. Natural killer cells produce specific antibodies that kill
bacteria and viruses.
C. Mast cells are derived from monocytes.
D. Plasma cells are derived from T lymphocytes.
E. Macrophages are derived from neutrophils. -
✔✔ANSWER✔✔-A. Neutrophils, basophils, eosinophils
and monocytes originate in bone marrow.
Which of the following statements regarding the chemical
mediators of inflammatory responses is NOT true?
A. They may be secreted by cells residing in the area of
injury.
,B. They may be secreted by cells that enter the affected
area.
C. They may be generated by enzymatic cleavage of
proteins in plasma.
D. They are all peptides.
E. They may be chemotaxins. - ✔✔ANSWER✔✔-D. They
are all peptides.
After initial entry of bacteria into a cut in the skin,
vasodilation of local blood vessels and increased capillary
permeability occur. Which of the following events is NOT
part of the adaptive immune response to the infection?
A. antigen interaction with lymphocytes.
B. production of antibodies that bind to antigens.
C. B-cell differentiation into plasma cells.
D. vasodilation of local blood vessels.
E. activation of lymphocytes. - ✔✔ANSWER✔✔-D.
vasodilation of local blood vessels.
Chemotaxis:
A. refers to the chemical attraction of phagocytes to a site
of inflammation.
B. is important only for innate immune responses.
C. is important only for adaptive immune responses. D.
refers to the engulfing of microbes and foreign molecules
by macrophages.
E. refers to dilation of blood vessels by chemicals released
by damaged tissue cells. - ✔✔ANSWER✔✔-A. refers to
the chemical attraction of phagocytes to a site of
inflammation.
, Which of the following cell types binds to antigens on
plasma membranes of target cells and directly destroys
the cells?
A. neutrophils
B. NK cells
C. Cytotoxic T cells (CD8 cells)
D. Helper T cells (CD4 cells)
E. B cells - ✔✔ANSWER✔✔-C. Cytotoxic T cells (CD8
cells)
Which of the following statements regarding phagocytes
and phagocytosis is true?
A. Macrophages, monocytes, and mast cells are
phagocytes.
B. Contact of phagocytes with microbes stimulates the
phagocytes to release chemicals that mediate the
inflammatory response.
C. Phagocytosis is stimulated by the presence of proteins
called rhodopsins.
D. Phagocytosis is the process by which leukocytes exit
the bloodstream.
E. Phagocytosis is a process that only occurs within the
bloodstream. - ✔✔ANSWER✔✔-B. Contact of phagocytes
with microbes stimulates the phagocytes to release
chemicals that mediate the inflammatory response.
Which of the following statements regarding phagocytosis
is TRUE?
A. Macrophages are the only phagocytes in the tissues.
CORRECT DETAILED ANSWERS (VERIFIED
ANSWERS) |ALREADY GRADED A+
The immune system destroys or neutralizes:
A. bacteria.
B. viruses.
C. nonmicrobial foreign substances.
D. cancer cells that arise in the body.
E. All of the choices are correct - ✔✔ANSWER✔✔-E. All
of the choices are correct
Which is NOT true about viruses?
A. They consist of a nucleic acid surrounded by a
carbohydrate shell.
B. They require a host cell in order to reproduce
themselves.
C. They may reside in a host cell for years without killing it.
D. They may cause a host cell to become cancerous.
E. They may have genetic information in the form of RNA.
- ✔✔ANSWER✔✔-A. They consist of a nucleic acid
surrounded by a carbohydrate shell.
(protein shell is correct)
The killing of virus-infected or cancerous cells by the
immune system is called:
A. immune oversight.
B. immune surveillance.
,C. tissue immunity.
D. phagocytosis.
E. hemostasis. - ✔✔ANSWER✔✔-B. immune surveillance.
Which is TRUE regarding the immune system cells?
A. Plasma cells are derived from T cells.
B. Macrophages are derived from basophils.
C. Macrophages are derived from monocytes.
D. The immune cells found within the bloodstream are
called erythrocytes.
E. Neutrophils are classified as lymphoid cells. -
✔✔ANSWER✔✔-C. Macrophages are derived from
monocytes.
Which of the following statements about the immune
system is TRUE?
A. Neutrophils, basophils, eosinophils and monocytes
originate in bone marrow.
B. Natural killer cells produce specific antibodies that kill
bacteria and viruses.
C. Mast cells are derived from monocytes.
D. Plasma cells are derived from T lymphocytes.
E. Macrophages are derived from neutrophils. -
✔✔ANSWER✔✔-A. Neutrophils, basophils, eosinophils
and monocytes originate in bone marrow.
Which of the following statements regarding the chemical
mediators of inflammatory responses is NOT true?
A. They may be secreted by cells residing in the area of
injury.
,B. They may be secreted by cells that enter the affected
area.
C. They may be generated by enzymatic cleavage of
proteins in plasma.
D. They are all peptides.
E. They may be chemotaxins. - ✔✔ANSWER✔✔-D. They
are all peptides.
After initial entry of bacteria into a cut in the skin,
vasodilation of local blood vessels and increased capillary
permeability occur. Which of the following events is NOT
part of the adaptive immune response to the infection?
A. antigen interaction with lymphocytes.
B. production of antibodies that bind to antigens.
C. B-cell differentiation into plasma cells.
D. vasodilation of local blood vessels.
E. activation of lymphocytes. - ✔✔ANSWER✔✔-D.
vasodilation of local blood vessels.
Chemotaxis:
A. refers to the chemical attraction of phagocytes to a site
of inflammation.
B. is important only for innate immune responses.
C. is important only for adaptive immune responses. D.
refers to the engulfing of microbes and foreign molecules
by macrophages.
E. refers to dilation of blood vessels by chemicals released
by damaged tissue cells. - ✔✔ANSWER✔✔-A. refers to
the chemical attraction of phagocytes to a site of
inflammation.
, Which of the following cell types binds to antigens on
plasma membranes of target cells and directly destroys
the cells?
A. neutrophils
B. NK cells
C. Cytotoxic T cells (CD8 cells)
D. Helper T cells (CD4 cells)
E. B cells - ✔✔ANSWER✔✔-C. Cytotoxic T cells (CD8
cells)
Which of the following statements regarding phagocytes
and phagocytosis is true?
A. Macrophages, monocytes, and mast cells are
phagocytes.
B. Contact of phagocytes with microbes stimulates the
phagocytes to release chemicals that mediate the
inflammatory response.
C. Phagocytosis is stimulated by the presence of proteins
called rhodopsins.
D. Phagocytosis is the process by which leukocytes exit
the bloodstream.
E. Phagocytosis is a process that only occurs within the
bloodstream. - ✔✔ANSWER✔✔-B. Contact of phagocytes
with microbes stimulates the phagocytes to release
chemicals that mediate the inflammatory response.
Which of the following statements regarding phagocytosis
is TRUE?
A. Macrophages are the only phagocytes in the tissues.
