Praxis 5857 Practice Test Practice Question
Amniocentesis is an invasive diagnostic test that is best described as
Correct Answer: C
Rationale: Amniocentesis involves the extraction of amniotic fluid, which contains fetal cells, to analyze for chromosomal abnormalities and infections. This makes option C the most accurate description of the procedure.
Option A describes chorionic villus sampling (CVS), where cells are taken from the placenta, not amniotic fluid. Option B refers to maternal blood tests, such as the alpha-fetoprotein test, which assess specific proteins but do not involve amniotic fluid. Option D pertains to ultrasound imaging, which uses sound waves to visualize the fetus, rather than analyzing fluid or cells. Each of these options misrepresents the specific nature of amniocentesis.
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