Lecture 13 (08/25/2006 Friday)
Almost full load today! During lunch, Dr. Bergethon held an extra BioChem review which made the whole day a lot tighter (like a tiger). Also started physiology again ~ I think it’s much better than EXCEL Physiology for some unknown reason. Maybe because Dr. Levy had to teach a wide variety of physio topic, thus convoluting the entire thing.
Ethics
- Taught by Dr. Sarkis
- Grab the latest Power Point from CourseInfo (was updated from a couple weeks ago)
Summary:
Academic conduct! The class actually had a discussion about whether a cheater should be allowed to… cheat ~ if extreme circumstances apply. I don’t know if people were playing devil’s advocate for fun (and to make Dr Sarkis happy), but in my opinion, if another student had an unfair advantage that is not allowed, then that’s cheating and must be punished accordingly. Expulsion may be too harsh, but at the very least - a score of zero on whatever it is and conduct noted on record.
BioChem
- Taught by Dr. Phillip Stone (it would’ve been so kickass if his voice is like Stone Phillips)
- Lecture Notes, follow the CourseInfo PPT
- Topic: Hemoglobin, Myoglobin
Summary:
The key to understanding the whole deal is the plot of partial pressure of O2 versus % saturation. If you really understand what is going on with the plot, then the whole lesson is a lot easier. So, at high partial pressure of O2, like in the lungs, then all the hemoglobin/myoglobin will gobble up the oxygen like no tomorrow. However, at lower partial pressure areas, like while the blood is in the artery, or in various spaces within the body, then a percentage of oxygen will be release by some percentage of hemoglobin. And in oxygen intense area like the muscle, where oxygen is nearly deprived completely, then most oxygen will be sucked out of the hemoglobin/myoglobin.
It’s all pretty easy — and the shifts in the plot, when BPG and various Bohr ions are in effect, simply make the hemoglobin tight like a tiger and more resistant to picking up oxygen or keeping oxygen. Basically, when hemoglobin is tight like a tiger, it’s rigid and less likely to carry around oxygen.
BioChem Review 04-07
- Taught by Dr. Bergethon
- Review Notes
- Topic: pH, Acid & Bases, protein purification & analysis
Summary:
Nothing too hard… the way I look at pKa vs pH includes the [OH-] as well, and just think about in the solution, which is greater. Like today’s lesson, we looked at pH = 7, and then the pKa of Carboxylic Acid-R of 2.2. Where is it gonna be? Well… if we write it out ~
[R-COOH] + [-OH] <> [R-COO-] + [H+]
Since the pH is 7, that means there’re a lot of [-OH] than the Carboxylic Acid require, which will push the equilibrium to the right, or higher concentration of [R-COO-]. So then, HA:A- = 1 : 10^5.
Physiology
- Taught by Dr. Lehman & Dr. Levy
- Lecture Notes
- Topic: Neuron, Action Potential, Resting Potential, Ion Channel, Gated Channel, Vm, Driving Force, Sodium Potassium Pump, Nernst Equation
Summary:
Erm, neuron get excited, get all electrical and transmit an action potential that’s almost digital in amplitude. For it to get such, there need to be a electrical potential gradient… which occurs after potassium floats out of the leakage channel and etc. Depolarization occurs when sodium is allowed in with gate opening. Think that’s about it.
August 25th, 2006 at 10:41 pm
In regards to the Ethics lecture, when Ms. Sarkis asked whether “non action” can be the best course of action to take when it comes to cheating. A girl in the class gave an example of “doing nothing” if she has seen a woman being raped! in a street. Silly example if you ask me!