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The three general categories of teratogens are maternal disorders, drugs, and environmental influences.

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What percent of birth defects are caused by teratogens?

About 7% of all congenital defects are caused by exposure to teratogens


Substances that lead to birth defects?

Teratogens


Why is an embryo less susceptible to teratogens per or to implantation?

An embryo is less susceptible to teratogens prior to implantation because it is still at a stage where all or nothing death may occur. During implantation, the embryo undergoes specific developmental processes that are crucial for its survival. After implantation, the embryo becomes more susceptible to teratogens as it continues to develop and differentiate into specific tissues and organs.


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Which of these statements is trueTeratogens were developed by scientists to aid in producing healthy fetuses?

Teratogens can cause birth defects.


What is most likely to happen if teratogens are introduced during the germinal period of development?

If teratogens are introduced during the germinal period of development (first two weeks after conception), it is most likely that the pregnancy will not continue, resulting in a miscarriage. This is because exposure to teratogens during this time can disrupt the normal development of the embryo and prevent it from implanting properly in the uterus.


Agents that have a negative effect on prenatal development are called?

Agents that have a negative effect on prenatal development are called teratogens. These can include drugs, alcohol, certain medications, infections, and environmental pollutants that can interfere with the normal development of the fetus.


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What factors that affect the impact of teratogens on the prenatal organism?

The factors that affect the impact of teratogens on the prenatal organism includ the dose, heredity, other negative influences, and age. -dose: larger doses over longer time periods usually have more negative effects -heredity: the genetic makeup of the mother and the developing organism plays and important role. Some individuals are better able than others to withstand harmful enviorments -other negative influences: the presence of several negative factors at once, such as additional teratogens, poor nutrition, and lack of medical care, can worsen the impact of a harmful agent -age: the effects of teratogens vary with age of the organism at time of exposure.


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