The student who caught the cold caused by this specific Rhinovirus was exposed to the exact same Rhinovirus 18 months later. Memory B cells of the immune system will protect her from getting the same cold again.
In immunology, a memory B cell (MBC) is a type of B lymphocyte that forms part of the adaptive immune system. These cells develop within germinal centres of the secondary lymphoid organs.
Memory B cells circulate in the blood stream in a quiescent state, sometimes for decades. Their function is to memorize the characteristics of the antigen that activated their parent B cell during initial infection such that if the memory B cell later encounters the same antigen, it triggers an accelerated and robust secondary immune response.
Memory B cells have B cell receptors (BCRs) on their cell membrane, identical to the one on their parent cell, that allow them to recognize antigen and mount a specific antibody response.
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Answer:
Same: Mitochondria,Cell membrane,Vacuole
Different: Cell wall,Chloroplast
Explanation:
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Answer:
the word "geo" comes from a prefix of earth
Explanation:
"earth", usually in the sense of "ground or land"; as a prefix, it may also mean "global" or relate to the planet Earth.
There are both natural and human sources of carbondioxide<span> emissions. Natural sources include decomposition, ocean release and </span>respiration<span>. Human sources come from activities like cement production, </span>deforestation<span> as well as the burning of </span>fossil fuels<span> like </span>coal, oil<span> and </span>natural gas<span>.</span>
