1. Fill in the blank: The ________ of a lymphocyte results in immune cells that have gained...

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Medical Sciences

1. Fill in the blank:
The ________ of a lymphocyte results in immune cells that havegained the ability to attack specific antigens.
2. How does a virus, such as HIV, typically enter a cell? Whatstructure does the virus use to enter the cell?
3. Explain why we need the mechanisms of the adaptive immunesystem even though nonspecific or innate resistance mechanismsattack all foreign antigen (in other words, what purpose does theacquired immune system serve?)

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1 Bcells of lymphocytes B lymphocytes produceantibodies proteins gamma globulins thatrecognize foreign substances antigen and attachthemselves to them B lymphocytes or Bcells are each programmed to make onespecific antibody2 When HIV infects acell it first attaches to and fuses with the hostcell Then the viral RNA is converted into DNA andthe virus uses the host cells machinery toreplicate itself during a process called reverse transcription Thenew copies of HIV then leave the hostcell and move on to infect othercellsVirus enters cell byendocytosis In the cytoplasm the capsid comes apart releasingthe RNA See Answer

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