PSYC1011 Lecture Notes - Lecture 3: Drug Withdrawal, Zygote, Osmosis
Document Summary
Cells around fertilized egg transform into the placenta. Osmosis - liquid within the placenta balances to that chemicals are transferred from mother to child, oxygen, nutrients, carbon dioxide, etc. Nicotine and alcohol can pass through the placenta, heroin, microorganisms, viruses. Babies experience drug withdrawal when the mothers pass onto the baby. Zygotic period last about two weeks, then the zygote implants around the uterine wall, begins the embryonic period (period of more rapid growth) During the embryonic period the baby is very vulnerable to new things introduced, certain drugs can cause birth defects when introduced in this period. Third period is the fertile period, more quantitative growth, consolidating mass. Anoxia - brain damage during gestation, cut off of oxygen. Psychological state of the mother can affect the baby, mothers with high levels of anxiety give birth to babies who don"t do as well.
