Biology Questions and Answers
If the inflammatory attack is not enough
to halt the infectiousstill relies on a specific defense, the process the body
immune response proper (humoral and
cellular) performed by the lymphocytes.
- What is the difference
between humoral specific
immune response and cellular
specific immune response?
Humoral specific immune response is
the defense systemantibodies, defense proteins secrete by means of (^) d by
lymphocytes that attack foreign agents
with high specificity.immune response is the defense system Cellular specific (^)
by means of specific lymphocytes (cells)
that directly attack other foreign cellsand agents.
- What is an antigen?
Antigen is any substance, particle or
infectious athe body. The contactgent recognized as foreign to of the antigen
with the body promotes a defense
reaction against thspecific or both). e antigen (unspecific,
- What are the cells
responsible for the production
of antibodies?
The cells that produce antibodies, i.the cells of the humoral immune e.,
system, are the B lymphocytes (B cells).
- What are
immunoglobulins?
Immunoglobulin is the alternate name
given to antibcomplex proteins coody. Immunoglobulins arentaining an
invariable portion and a variable portion
and made of four polypeptide chains.The variable portion of each
immunoglobulin is responsible for the
high specificitybond. of the antigen-antibody - How do antibodies work to
neutralize antigens?
The antibodies, or to facilitate the destruction of immunoglobulins, actantigens:
they attracttrigger the attack of specific de phagocytic leukocytes,fense they
molecules (activation of the complement
system) antoxicity of some antigd they directly neutralizens. e the - How can an organism that
once underwent contact with
an antigen be immunized
against future infections by
the same agent?
This phenomenon is called immumemory. When an antigen makesne
contact for the first time with cells of
the humoral immlymphocytes that are une system,producers of B (^)
specific immunoglobulins against that
antigen their antibmultiply anodies. This is called pd in days synthrimaryesize
response. Some of these specific B
lymphocytes remaifor a long time, somn in the circulationetimes during the (^)
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