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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.
-What might be among the research team's conclusions?
A) The young women showed these results because they have poorer nutrition.
B) The elderly persons' samples demonstrated their lowered immune responses.
C) The young men had higher responses because they are generally healthier.
D) The patient samples should have had the lowest response but did not, so the experiment is invalid.
E) The elderly donor samples represent cells no longer capable of any cell division.

Question

Quizplus · Accepted Answer

The research team concluded that the elderly persons had significantly lower lymphocyte incorporation after pathogen introduction, indicating a lowered immune response. This conclusion is supported by the repeated results from the larger sample size. The other options, such as poor nutrition or general health, are not mentioned in the given information and cannot be inferred. Option D is also incorrect as the patient samples are not specified to have had the lowest response. Option E is not mentioned in the given information.

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