<p>quick! example of positive feedback</p>
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<p>I third this motion.</p>
<p>What chemical structures do we need to know? I only know the -ols and chlorophyll (it always has that Fe in the middle).</p>
<p>Positive feedback:</p>
<p>…</p>
<p>I have no idea.</p>
<p>Arg. I thought I had studied well…</p>
<p>To what extent do we need to know the labs? We didn’t do all of them in class…</p>
<p>Child birth!!!</p>
<p>"gahhhh 69 raw score before multiplying… that makes it like 52 raw score… omg fail fail fail… audit fail. "</p>
<p>You realize you need a strait average of 5’s or 6’s on FRQ’s (i.e. a 9, a 2, an 8, and a 3) and you will get a 5, right?</p>
<p>I think we all need to chill…</p>
<p>Sleep would help as well…</p>
<p>Anyone want to take a stab at these questions from AP Central?</p>
<p><a href=“b”>quote</a> Explain how oxygen and glucose are transported within the circulatory
system of mammals.
(c) Explain the transfer of oxygen and glucose from the blood and into the
active cells of mammals.
[/quote]
</p>
<p>Child birth, lactation, and inflammation are the easiest 3 examples for positive feedback IMO.</p>
<p>Most of the lab information is given, and shouldn’t be too hard (just review chemicals like dPIP in the chlorophyll lab). The only issue I would see if they ask for a chi-squared thing like on the 2003. Props if you can actually figure that stuff out ;_;</p>
<p><a href=“b”>quote</a> Explain how oxygen and glucose are transported within the circulatory
system of mammals.
(c) Explain the transfer of oxygen and glucose from the blood and into the
active cells of mammals.
[/quote]
b. The heart first pumps oxygen-deprived blood into the pulmonary artery, which goes to the lungs and diffuses into capillary beds that wrap around alveoli, minuscule air sacs that contain air gathered from outside. There, oxygen from the alveoli diffuse into the blood and CO2 from the blood diffuse into the alveoli due to negative pressure on both sides. Then, the oxygen attaches to hemoglobin, which contains 4 Fe atoms to facilitate the process. The oxygen-rich blood then returns to the heart via the pulmonary vein.
To get glucose, the blood travels in a large artery to the liver, which is stimulated by glucagon from the islet of Langmer (w/e). This allows the liver to catabolize glucose and make it available to be picked up. The C6H12O6 molecule diffuses across the capillary beds and is incorporated into the blood plasma. (******** alert)</p>
<p>C. For oxygen to be transferred from the blood to the cells, the blood first must flow through immensely tiny capillary beds next to the cells in question. Then, the heme groups must release their oxygen molecules. Unless the body is in a critical state of oxygen deprivation, the hemoglobin will always retain at least one oxygen molecule. Then, the oxygen diffuses across the cell-thick layer into the interstitial fluid, where it is absorbed by the cells that require it. Glucose, much like blood, must undergo a similar process. The glucose-rich blood must flow into the capillary bed near the cells to be given material. However, the glucose may simply diffuse from the blood plasma into the interstitial fluid of the cells instead of being released from a heme group or equally complex system.</p>
<p>We had to learn about glucose?</p>
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<p>Would they give you the equation? Or do you have to memorize it?..</p>
<p>What is chi-squared? I seriously don’t even know what unit that’s a part of, and I read through all of CliffNotes >_></p>
<p>chi-squared would be very very cruel.
do u think the hulk was serious? that really worries me- my teacher has given us a bunch of exams that were all from released AP tests and I havent seen half of those words</p>
<p>I think if you knew what hulk said, you would be very assured of getting a 5. That said, I also think that if you knew only some of what he said, you could also get a 5. I kind of think he posted that list to be a little pedantic and intimidating, if I’m going to be brutally honest :o</p>
<p>i think chi squared is in one of the labs. not that the lab book makes sense.</p>
<p>i’m more worried about the frqs. it feels like if u know it, u know it, if u dont u’re gonna be screwed on the entire thing.</p>
<p>I’m not that worried about frq’s, in most of them you can just toss out the words and concepts you associate with the given topic and get at least a few points.</p>
<p>Actually, I’m a little worried about the lab one, since we didn’t do any of them.</p>
<p>u only need straight 5 and 6s on the frqs? with what on the multiple choice?</p>
<p>They give you the chi-squared equation, but the process of actually figuring everything out is so damn meticulous and ridiculous that you might as well pool your efforts into the other 3 FRQs instead (it’s possible to get 8/10 points even without chi-squared calcs though).</p>
<p>[</a> bricks](<a href="Supporting Students from Day One to Exam Day – AP Central | College Board">http://apcentral.collegeboard.com/apc/members/repository/ap03_sg_biology_26426.pdf)</p>
<p>There’s also one where they give you a gel electrophoresis chart and ask you to make a circle diagram out of the results ([2007</a> #4](<a href=“Supporting Students from Day One to Exam Day – AP Central | College Board”>http://apcentral.collegeboard.com/apc/public/repository/_ap07_biology_sgs_final.pdf))</p>
<p>true, its a lot easier to “count points” on a bio frq than figure out if you’ll get a nine on a lit or history essay</p>
<p>lab one? wasn’t that just osmosis?</p>