Explain why a pregnant woman should not have an abdominal X-ray and identify the possible consequences to the fetus if she does
What will be an ideal response?
Pregnant women should avoid all unnecessary X-rays. Radiation, especially medical X-rays, can be a teratogen. The human embryo is most sensitive to teratogens during the early stages of pregnancy. Large doses of radiation during weeks 2 –18 can affect the brain and central nervous system and significant radiation exposure before birth can increase the risk of cancer later in life. Pregnant women should avoid all unnecessary X-rays.
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A. 2 B. 4 C. 20 D. 61 E. 64
Which of the following describes the function of the nephron?
a. generating urine b. increasing glucose levels c. controlling body temperature d. transferring heat to veins
The world's first photosynthetic organisms were also the first to adapt to intertidal zones. What is the name of the group that includes these organisms?
a. plants b. cyanobacteria c. algae d. fungi
Members of the actinomycetes reproduce asexually by
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