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Satmi

Member Since 13 Jun 2009
Offline Last Active Yesterday, 20:41

In Topic: Biology HL P1 and P2 - TZ2

May 19, 2012 - 13:23

View PostIBCONQUERER, on May 19, 2012 - 12:58, said:

I think a more logical explanation is that if less monocytes are produced then it shows that the infection is almost gone because there is simply no need to produce them..I think if they are produced they will differentiate anyway which is why the body produces more of them initially with placebo and then as time progresses it decreases their production because there is simply no need to produce alot of them now!
But wasn't the difference between the drugs what we were supposed to analyse in that question as well?

In Topic: Biology HL P1 and P2 - TZ2

May 19, 2012 - 12:52

View PostSara.Taha, on May 19, 2012 - 11:08, said:

View PostSatmi, on May 19, 2012 - 10:36, said:

P1 was easy I think, although I already know that I made the wrong choice in several of them – which is never a good sign. The question about phytochrome, to me, seemed to have two correct answers. c) I think claimed that pfr promotes flowering in long-day plants and d) that pfr inhibits flowering in short-day plants. Both are correct, no? Or did I just misread either the question or the choices?

That was tricky question.. if you continued reading the sentence in choice 'C' it says it promotes flowering in long-day plants during LONG NIGHT.. you cannot have both a long day and a long night which makes option 'C' wrong.. the same thing did apply for option 'A' (short-day + short night) .. WRT option D & B I don't really remember which one was right.. the answer was it promotes flowering in long-day plant during short nights..
Oh right, so I just misread it then. Or It could be that I remember the letters wrong.
I just recall reading the question and options over and over (very weird that I missed something so obvious), being very confused and thinking that either of two choices should be correct. :D I think in the end I picked the one where it was said to inhibit flowering in short-day plants... I'm now really hoping it actually said during long nights.

EDIT:


View PostIBCONQUERER, on May 19, 2012 - 12:51, said:

I think antibiotics are ineffective not antibodies because if antibodies weren't effective everytime someone got a cold they wouldn't be able to be cured! And I think there were 2 3 mark questions then I must've gotten wrong because the second last one asked about the effect of monocytes and how they indicated something and I said more monocytes meant more macrophages produced and so more antigen presentation, t-cell and b-cell activation and thus more production of antibodies which indicated a stronger response..crappie me, I hope I don't get it all wrong though give me like 2 points out of 3 IB please :P! And which one had the most delayed response??
That I'm actually not so sure about, now that I think about it. I considered it as well (that monocyte production would mean more macrophages), but then there was something (probably the results of the placebo group) that clearly did not make sense in that interpretation to me. It was more like I was I wondering why monocyte production could be thought to stay constant.
But I mean there shouldn't be anything in antipyretic drugs that promotes immune response?

In Topic: Biology HL P1 and P2 - TZ2

May 19, 2012 - 10:36

P1 was easy I think, although I already know that I made the wrong choice in several of them – which is never a good sign. The question about phytochrome, to me, seemed to have two correct answers. c) I think claimed that pfr promotes flowering in long-day plants and d) that pfr inhibits flowering in short-day plants. Both are correct, no? Or did I just misread either the question or the choices?

P2's first question was indeed weird – in the sense that they would choose data like that for analysis. I don't think I ended up having any problems with it, but there was this constant doubt that am I now really doing this correctly since they normally have much more... normal data.
And overall a really weird paper as well, for the reasons already mentioned. I suppose it was fine (although I'm wondering if I said enough for the 8-mark questions in Section B) – we had people leaving really early, but I on the other had found out that checking your answers might be worthwhile. In the X Y Z plant leaf diagram I had written palisade mesophyll and xylem the other way around...

View Postvids.10, on May 19, 2012 - 09:58, said:

If there would be no drugs, taking "placebo" , then how come faster the macrophage response?
Because anti-inflammatory drugs reduce the natural immune response, just like in all the other parts of that question. I do feel though that the purpose of the placebo group was pretty unconventional – clearly there should have also been a group who took no drugs for the placebo to actually account for something. Maybe it was just excluded from the data.

In Topic: Physics HL TZ 2 Paper 3

May 17, 2012 - 17:07

View PostHoolaBaloola, on May 17, 2012 - 16:26, said:

I think that's incorrect! A star with apparent magnitude of -35 would be brighter than the sun at lunchtime!!

View PostSatmi, on May 17, 2012 - 13:45, said:

That would be one bright star...
As I said, I used the wrong unit in the calculation. :D

In Topic: Physics HL TZ 2 Paper 3

May 17, 2012 - 13:45

View Posti7amani, on May 17, 2012 - 08:21, said:

how come no1 did relativity??/ :-/ coz it was rather easy actually in the exam...paper 3 by far...the best out of the 3
I did. It's just that I never studied it before the previous night, and I did not have time to look at general relativity at all. :D I was able to do surprisingly many of the calculations though, so it went pretty much according to the plan.
Astrophysics was quite easy, but I'm seriously worried about my handwriting. And I think I used the wrong unit in the apparent magnitude calculation, so I got something around -35 as the result. That would be one bright star...


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