NURSING ANM AND GNM

NURSING EXAM QUESTIONS

TOXICOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Teratogens are substances that cause
A
cancer
B
embryonic defect
C
allergies
D
mutations
Explanation: 

Detailed explanation-1: -Teratogens are substances that cause congenital disorders in a developing embryo or fetus. A teratogen is anything a person is exposed to or ingests during pregnancy that’s known to cause fetal abnormalities. Drugs, medicine, chemicals, certain infections and toxic substances are examples of teratogens.

Detailed explanation-2: -As a baby grows in the womb, teratogens may affect parts of the baby’s body as they are forming. For example, the neural tube closes in the first 3 to 5 weeks of the pregnancy. During this time, teratogens can cause neural tube defects such as spina bifida.

Detailed explanation-3: -The embryonic period, during which organogenesis takes place, occurs between implantation at around 14 days to around 60 days postconception. This is usually the most sensitive period to teratogenesis when exposure to a teratogenic agent has the greatest likelihood of producing a malformation.

Detailed explanation-4: -Teratogens are substances that may produce physical or functional defects in the human embryo or fetus after the pregnant woman is exposed to the substance. Alcohol and cocaine are examples of such substances.

There is 1 question to complete.