<span>E. Stimulation of T-cell by APC</span>
The initial exposure of the body to an infectious agent e.g. through a vaccine, triggers an immune response most of which rapidly diminishes after the vaccination. However some cells of the immune system called lymphocytes remain with a memory of that pathogen.As a result, if the same pathogen infects a vaccinated person, the memory cells remember and recognize it and rapidly spring into action triggering a much more rapid response specific to that pathogen than the initial exposure, effectively dealing and neutralizing the pathogen.
An antimicrobial<span> is an agent that kills microorganisms or inhibits their growth. </span>Antimicrobial <span>medicines can be grouped according to the microorganisms they act primarily against. For example, antibiotics are used against bacteria and antifungals are used against fungi.
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Selective toxicity<span> refers to the ability of the drug to targets sites that are relative specific to the microorganism responsible for infection. Sometimes these sites are unique to the microorganism or simply more essential to survival of the microorganism than to the host.
Selective theory relates to antimicrobial because the antimicrobial is the drug that kills microorganisms and inhibits there growth, selective theory is the ability of the drug.
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I think that the best phrase to fit into the blank is a "scientific theory".
A scientific theory is developed through experiments which use the scientific method, and a theory can be improved if additional data is available or if people provide suggestions which make the theory fit the data better.
It's a region of DNA that binds DNA Polymerase to begin replication.
1st -When cells are small, the movement of food and waste can be efficiently handled by the cell membrane
