Which protein can be produced by a virus-infected cell, in order to communicate with other cells that need to produce antiviral proteins?
Which of the following does not illustrate the use of universal precaution methods in the handling of patients and body substances?
A. Sterilizing or disinfection of dental hand pieces
B. Mask and gloves
C. Healthcare worker with active, open lesions handling patients
D. Hand washing
The dried residues of fine droplets from mucus or saliva that harbor and transmit pathogen are ______
A. biological vectors
D. droplet nuclei
A. are derived from T lymphocytes.
B. function in cell-mediated immunity.
C. function in blood clotting.
D. produce and secrete antibodies.
Antigen presenting cells
A. include dendritic cells.
B. include macrophages.
C. engulf and modify antigen to be more immunogenic.
D. hold and present processed antigen on their cell membrane surface.
E. All of the choices are correct.
A properly functioning immune system is responsible for
A. surveillance of the body
B. recognition of foreign material.
C. destruction of foreign material
D. All of the choices are correct.
Which of the following is not an event of phagocytosis?
An effective test to determine whether an individual is allergic to a specific substance is to
A. inject high levels of the allergen so see if the patient goes into anaphylactic shock.
B. test for levels of IgE specific for the allergen.
C. test for high levels of IgG in the serum.
D. test for high levels of IgG in the serum.
Each of the following is inoculation of normal biota to a newborn except
A. the birth process through the birth canal
B. bottle feeding
C. breast feeding
D. contact w/ hospital staff
E. All of the choices shown
Live, attenuated vaccines
A. include the Sabin polio vaccine.
B. include the measles, mumps, rubella vaccine (MMR).
C. contain viable microbes that can multiply in the person.
D. All of the answers shown
DiGeorge syndrome is the result of
A. delayed hypersensitivity.
B. congenital absence or immaturity of the thymus gland.
C. a genetic defect in the development of both T cells and B cells.
D. failure of B-cell development and maturity.
MHC molecules are found on all of the following cells except ______.
A. islet of Langerhans cells
B. epithelial cells
D. red blood cells
A symptom is _______.
A. a subjective indication of disease
B. measurable by health care personnel
C. an objective indication of disease
D. a temperature
All of the following pertain to platelets, except
A. they function primarily in hemostasis.
B. they contain hemoglobin to transport oxygen and carbon dioxide.
C. they originate from giant multinucleate cells called megakaryocytes.
D. they are not whole cells but are pieces of cells.
The antibody-secreting progeny cells of a B-cell clone are called
A. plasma cells.
B. activated macrophages.
C. sensitized T cells.
E. bursa cells
All of the following represent potential therapy for patients with SCID except
A. graft versus host.
B. transfusion with adensosine deaminase.
C. bone marrow transplants.
D. stem cell grafts.
Tissue transplanted from one body site on a patient to a different body site on that patient is called a(n) _____
A. body tissues that the immune system mistakes as foreign.
B. bacterial toxins that activate T cells at a 100 times greater rate than other antigens.
C. cell markers found in some member of a species but not in other members.
D. antigens that evoke allergic reactions.
A disease that has a steady frequency over time in a particular geographic location is referred to as ______.
The region of each antibody molecule where amino acid composition is highly diversified from one clone of B lymphocytes to another is the ______ region.
A. cell markers found in some member of a species but not in other members.
B. antigens that evoke allergic reactions.
C. bacterial toxins that activate T cells at a 100 times greater rate than other antigens.
D. body tissues that the immune system mistakes as foreign.
The term _____ refers to the presence of small numbers of bacteria in the blood.
T/F: Gamma globulin can be given as immunotherapy to confer artificial passive immunity.
What type of molecules act to draw phagocytes to foreign substances?
An antihistamine will
A. block synthesis of leukotrienes.
B. reverse spasms of respiratory smooth muscles.
C. inhibit the activity of lymphocytes.
D. bind to histamine receptors on target organs.
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