Tuesday, March 11, 2008
Mon-Day 1
Bio- we discussed the development of a human in the uterus, starting with the implantation of the embryo in the thick, capillary-lined uterine wall, which establishes pregnancy. The embryo develops via cell division and then cell differentiation/specialization into a fetus that can exchange nutrients, wastes, hormones, antibodies, and even drugs or medicine with the mother via the placenta, which is connected to the baby by her/his umbilical cord. However, there is NO mixing of blood between baby and mother via the placenta, otherwise a clotting reaction could ensue if the baby and mother have incompatible blood types.
The baby is protected by the amniotic sac which is filled with a fluid in order to absorb shocks; cells from the baby that are floating in the amniotic fluid may be examined for genetic defects via amniocentesis. The baby is delivered via the birth canal followed by the placenta; however, a baby can be delivered surgically through the abdominal region via Caesarian section.
We saw an animation of the menstrual cycle. We followed the hormonally-controlled stages from menstruation to follicle development to ovulation to the luteal stage and then to either fertilization and pregnancy or to menstruation again.
Chem 7- we showed a couple of stoichiometry shortcuts that you can take advantage of due to the proportionality constants between moles and liters of gas at STP and also between moles and the number of particles. Since moles are DIRECTLY proportional to these quantities, you can directly use liters of one GAS in the balanced equation to find the liters of a different gas or you can directly use the number of particles of a given reactant in the balanced equation to find the number of particles of a different reactant or product in the same equation (any phase is fine).
Chem 8/9- we showed a couple of stoichiometry shortcuts that you can take advantage of due to the proportionality constants between moles and liters of gas at STP and also between moles and the number of particles. Since moles are DIRECTLY proportional to these quantities, you can directly use liters of one GAS in the balanced equation to find the liters of a different gas or you can directly use the number of particles of a given reactant in the balanced equation to find the number of particles of a different reactant or product in the same equation (any phase is fine).
In our single replacement of copper II ions by magnesium ions, we tried to filter out the atomic copper. I noticed that some of the copper had not been taken out of solution. We will discuss this on Wednesday.
The baby is protected by the amniotic sac which is filled with a fluid in order to absorb shocks; cells from the baby that are floating in the amniotic fluid may be examined for genetic defects via amniocentesis. The baby is delivered via the birth canal followed by the placenta; however, a baby can be delivered surgically through the abdominal region via Caesarian section.
We saw an animation of the menstrual cycle. We followed the hormonally-controlled stages from menstruation to follicle development to ovulation to the luteal stage and then to either fertilization and pregnancy or to menstruation again.
Chem 7- we showed a couple of stoichiometry shortcuts that you can take advantage of due to the proportionality constants between moles and liters of gas at STP and also between moles and the number of particles. Since moles are DIRECTLY proportional to these quantities, you can directly use liters of one GAS in the balanced equation to find the liters of a different gas or you can directly use the number of particles of a given reactant in the balanced equation to find the number of particles of a different reactant or product in the same equation (any phase is fine).
Chem 8/9- we showed a couple of stoichiometry shortcuts that you can take advantage of due to the proportionality constants between moles and liters of gas at STP and also between moles and the number of particles. Since moles are DIRECTLY proportional to these quantities, you can directly use liters of one GAS in the balanced equation to find the liters of a different gas or you can directly use the number of particles of a given reactant in the balanced equation to find the number of particles of a different reactant or product in the same equation (any phase is fine).
In our single replacement of copper II ions by magnesium ions, we tried to filter out the atomic copper. I noticed that some of the copper had not been taken out of solution. We will discuss this on Wednesday.
# posted by C @ 2:22 PM 
