Tuesday, March 2, 2010
Tues-Day 2
Bio - we began our new unit on regulation via the Nervous System; we discussed various environmental STIMULI as well as the neuron RECEPTORS that can detect the stimuli and send an electrochemical signal throughout the nervous system by secreting neurotransmitters between neurons.We discussed the physiology/structure of the nerve cell/neuron and showed how and where they conduct a nervous impulse/signal to muscles or glands in the body.
AP Chem - we EXPLAINED the reason for equilibrium shifts due to system "stresses" in terms of kinetics/collision theory thus rendering Le Chatelier superfluous and insufficient. Of course, Le Chat's rule tells us WHAT the chemical shift will be BUT kinetics tells us HOW/WHY the shift really occurs.
We explained the effect of various stresses on the number of effective collisions per second in the forward and reverse reactions; thus we quantitatively explained the direction of any shift due to the stress.
We moved on to the Acid-Base unit by discussing characteristics of acids as well as the definition of Bronsted acids and bases as well as Bronsted conjugate acid base pairs.
Tomorrow, we will do two more equilibrium review problems for Thursday's test.
# posted by C @ 4:28 PM 
