Woke up much refreshed today. Funny what a full night’s sleep will do for a person. I went to lectures and even paid attention. During the usual Anatomy lecture slot there was the second multi-choice lab test. We were given 15 slides with 3 questions each pertaining to a picture on the slide. Two minutes were given per slide. I managed to get 35 of the answers correct and changed a few wrong answers to correct ones. There were 7 slides where I answered all three questions correctly, and no slides that were all wrong. Overall much better than the first test (though only one point higher).
I also picked up my Physiology midterm1 (the second midterm is next week) today. There is absolutely NOTHING helpful comments wise. I had spelling errors circled and “semipermeable” inserted where I forgot it (hurray being rushed for time). Still managed 32/40 so not terrible.
This is the last week of welfare lectures before we start presenting case studies. I am so very glad of that. This lecturer is the epitome of terrible. He reads the handout or study guide shamelessly and doesn’t indicate at all what might be important. He tries to make jokes and gets awkward laughs from the 6 people who were actually listening. There are no visual aids at all. According to the third years that I know he does get better when teaching physiology, but this series of lectures is not looked back on fondly. I hope its part of the curriculum that is changed for next year’s students.
Physiology continued with circulation and small vessels. There is far too much physics and not enough biology. Though we did learn about NO (nitric oxide, nitrogen monoxide) and how it works as a vasodilator. The small molecule is actually produced by the single layer of cells lining the blood vessels (endothelial cells) as part of a larger molecule which is stored in the cells. When blood flow increases it causes distortion of the cells which triggers the enzymes near the basement membrane (side not facing the blood) to cut the NO off of the larger molecule so that it can diffuse out of the cells. Since the NO molecules are so small they rapidly diffuse in all directions (including into the blood). When they reach the smooth muscle of the vessels, it causes the muscle to relax which widens the opening (lumen) and lowers the pressure. The NO that gets into the blood can trigger down-stream muscle cells to also relax causing a wider range of effect. This is why Nitroglycerin works for angina patients. The pain is caused by the coronary vessels being too constricted, the Nitroglycerin is converted to NO and causes the vessels to dilate. This is also part of the trouble with shock. When all of your vessels suddenly dilate at the same time you get a severe drop in blood pressure. Blood can’t get back to your heart, so your heart is pretty useless at pumping which causes all number of problems.
After the midterm, my Animal Handling practical group got together because we are presenting a case report next week. Our group is presenting on one of the member’s horse’s rearing problem. We hashed out most of what we are going to talk about. One of the members is going to turn the notes into a PowerPoint and we are going to get together on Monday to go over it. The presentation isn’t being graded so we aren’t terribly worried about it.
After the meeting was Anatomy Lab. Today we started in on the hind limb, which naturally made me think of chicken legs. Each of the muscles that we looked at corresponds to one on a drumstick. Made us all very hungry. We also palpated bony landmarks on a recently deceased racing gray hound. The lack of body fat made following the hip bones very easy but finding things beneath the thick muscles was challenging.
I drove the Beast to school today, giving a lift to the flatmate who usually gives me rides. I made sure to park where there weren’t a lot of other cars and actually got in straight on my first shot. Leaving was another story. I pulled out of the space fine, but when going to scan my paystub at the exit, I managed to be too far away so had to reverse and pull closer. Luckily there was nobody behind me.
Quote of the day: “Well, recreational pharmacology is alright” – physio/anatomy lecturer (the Anatomy paper coordinator while giving a Physiology lecture) The context is unimportant, but I think we were talking about ECG’s