As an adaptive immune response progresses, the production of variant antibodies that compete more effectively for antigen occurs, and B cells producing these antibodies are preferentially selected on the basis of their improved binding to antigen
This phenomenon is referred to as _______.
a. isotype switching
b. neutralization
c. allelic exclusion
d. affinity maturation
e. somatic rearrangement.
D
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Influenza usually causes all of the following symptoms except
A. fever. B. severe fatigue. C. respiratory problems. D. gastrointestinal distress.
Muscular endurance is the
A. amount of force a muscle can produce with a single maximum effort. B. ability to move the joints through a full range of motion. C. amount of time required to contract a muscle completely. D. ability to resist fatigue and sustain a given level of muscular tension.
What is the meaning of the suffix -cele??
A) hernia; protrusion B) lack of; without C) growth; development D) beneath; below
Syphilis can have up to four stages.
Answer the following statement true (T) or false (F)