Question 1 (1 point) Which of the following is not a description of allergy? It
ID: 259968 • Letter: Q
Question
Question 1 (1 point)
Which of the following is not a description of allergy?
It is a hypersensitivity to an antigen.
It involves the immune system.
T cells are the most important contributors to the condition.
Anaphylactic shock is a severe example.
Question 2 (1 point)
The relative ability of a pathogen to damage a host is called its
invasiveness
virulence
toxigenicity
potency
Question 3 (1 point)
Which of the following is not true regarding T lymphocytes?
The immune system produces only one kind.
They may help macrophages to stimulate antibody production by B cells.
They may produce toxins that can kill foreign cells.
They can attack only cells with cognate antigens.
Question 4 (1 point)
Which of the following pathogens lives only in its host?
E. coli
staphylococcus aureus
smallpox
bubonic plague (Yersinia pestis)
Question 5 (1 point)
The effect of histamine is which of the following?
to attract neutrophils
vasoconstriction of capillaries
vasodilation of veins
to increase capillary permeability
Question 6 (1 point)
____ is the first process to occur in an inflammation.
Tissue swelling
Release of histamine from mast cells
Vasodilation
Attraction of leukocytes
Question 7 (1 point)
Transfusing a person with antibodies from a person or an animal who has been immunized provides which of the following?
active immunity
passive immunity
autoimmunity
anti-immunity
thank you
It is a hypersensitivity to an antigen.
It involves the immune system.
T cells are the most important contributors to the condition.
Anaphylactic shock is a severe example.
Explanation / Answer
1.T cell is the most important contributor to the reaction this is wrong it is mainly by the mast cells and antibody IgG.
2.virulence is the relative ability of pathogen to cause disease.
3.The immune system produces only one kind.There are many types of Things lymphocytes are present.
4.smallpox lives inside the host because it is caused by smallpox virus which needs only the host to reside inside and use the host cell machinery.
5.It increase the capillary permeability as when histamine is released white blood cells and proteins starts flowing to the area of infection.
6.vasodialation is the first step of inflammation which leads to the flow of cells which leads to redness,swelling and heat.
7.active immunity is transfer of antibodies from a person.
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