Discuss the role of the placental blood barrier
What will be an ideal response?
The placental blood barrier divides the mother's blood from the fetal blood supply. The barrier prevents mixing of maternal and fetal blood cells but permits movement of tiny molecules of nutrients, gases, and waste materials. The movement of most potentially harmful substances from the mother to the fetus is prevented. Some disease-causing substances are known to be transmitted from mother to fetus, often causing birth defects or premature death. Microorganisms such as the rubella virus, HIV, and the bacteria Toxoplasma gondii, substances such as alcohol, and drugs such as Thalidomide cross the placental blood barrier and cause fetal infection or birth defects. Other toxins or microorganisms cross the placental blood barrier during birth when the placenta is torn during the birth process and maternal and fetal blood is mixed.
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The Round Hill School in Northampton, Massachusetts was founded by Joseph Cogswell and George Bancroft, who had studied in Germany, and Charles Beck secured a teaching position at the school.
Answer the following statement true (T) or false (F)
Viscera:?
A)body cavities? B) directional term C) internal organs D) membranes lining the heart
All of the following may raise a woman's risk of contracting PID EXCEPT
A) having a pelvic exam. B) douching. C) having an IUD inserted. D) having multiple sex partners.
At the end of a 12-week aquatic program, one of the TR professionals at the Mifloraska asks a professor at her local university to look at her records to determine if the program met its objectives. This is an example :
a. internal formative evaluation. b. internal summative evaluation. c. external formative evaluation. d. external summative evaluation.