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The research team established similar lymphocyte cultures from a number of human donors, including healthy teenagers of both genders, patients already suffering from long-term bacterial infections, and elderly volunteers. They found that the increase in lymphocyte incorporation after pathogen introduction was slightly lower in some of the female teenagers and significantly lower in each of the elderly persons. They repeated the study with a larger number of samples but got the same results.
-Which of the following investigations might be most productive to show what the data on the teenagers might indicate?
A) test male teenagers
B) test teenagers who say they are not sexually active
C) test female teens at different times in their menstrual cycles
D) test relatives of the teens previously tested
E) test teenagers from different school systems

Question

Quizplus · Accepted Answer

Testing female teens at different times in their menstrual cycles would allow the researchers to investigate whether the observed decrease in lymphocyte incorporation after pathogen introduction is related to hormonal changes during the menstrual cycle.

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