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Author Topic: CHEM AND BIO HELP AND TIPS HERE  (Read 353753 times)

Offline Vin

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1545 on: May 23, 2010, 10:29:14 am »
Quote from: Nidzzz on May 23, 2010, 10:25:51 am
hey can1 explain wats a negative feedback

Quote from: Raywin on May 23, 2010, 05:06:36 am
Heyy.. see all the time the hypothalamus is monitoring small changes in the temperature of the blood. Like if it rises above normal, then it places actions to lower it. Then, as soon as the hypothalamus senses the lowered temperature, it stops these actions from taking place and starts off another action to help raise the temperature of the blood. This is known as Negative feedback.

The "feedback" refers to the fact tht when the hypothalamus has made the skin take actions to increase heat loss, information abt the effects of these action are FED BACK to the hypothalamus, as it senses the drop in blood temperature.

The "Negative" is because the information that the blood has cooled stops the hypothalamus making the skin do thses things..

I hope u have understood..  ;D  
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Offline thenewkid™

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1546 on: May 23, 2010, 10:31:50 am »
Quote
What topics do we think will come on Bio Paper 3 tomorrow?
I guess genetic engineering won't come since it came in O/N last year, and teeth can't come, since we had SO MUCH of that in P6 (variant 2, at least). Penicillin came in P6 too... so what else is left for Paper 3? Any ideas?


Reproduction - both in plants and animal (BIG chap)
Environment n stuff .. definitions of ecosystems population
Genetic variation .. mitosis and meiosis
Transport in animals and plants ..
Enzymes
wat else ?? .. i'll tell if i can think of any ..
there also huge chances for homeostasis and excretion
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Offline Moonlyte

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1547 on: May 23, 2010, 11:22:24 am »
Quote from: thenewkid™ on May 23, 2010, 10:31:50 am
there also huge chances for homeostasis and excretion

they can also ask about the heart, artery and veins + fungi and bacteria
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Offline Moonlyte

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1548 on: May 23, 2010, 11:31:58 am »
Quote from: aangel42 on May 23, 2010, 09:40:03 am
What topics do we think will come on Bio Paper 3 tomorrow?
I guess genetic engineering won't come since it came in O/N last year, and teeth can't come, since we had SO MUCH of that in P6 (variant 2, at least). Penicillin came in P6 too... so what else is left for Paper 3? Any ideas?

they can ask the same stuff again...for example, nov 2009 no. 6c and may 2009 no. 2e are the same questions!
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Offline Vin

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1549 on: May 23, 2010, 11:42:54 am »

yea u cannot trust them .. anything might turn up .. its better u know everything ... :)
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Offline thenewkid™

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1550 on: May 23, 2010, 11:52:38 am »
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yea u cannot trust them .. anything might turn up .. its better u know everything ...
yea CIE is pretty evil >:(
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Offline dodi23

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1551 on: May 23, 2010, 11:53:49 am »
the weird thing is most of the ppl who take exams 4rom cie hate it,,including me!!
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Offline Moonlyte

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1552 on: May 23, 2010, 11:54:40 am »
i've got a question here:

State the characteristic which is described in each of the following statements about living things.  
Statement: The increase in size or number of cells of an organism.
Characterstic: ???
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Offline Moonlyte

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1553 on: May 23, 2010, 11:56:07 am »
Quote from: dodi23 on May 23, 2010, 11:53:49 am
the weird thing is most of the ppl who take exams 4rom cie hate it,,including me!!

got no other option here...
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Offline dodi23

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1554 on: May 23, 2010, 11:56:46 am »
growth??
gd luck then wid igs ;)
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Offline thenewkid™

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1555 on: May 23, 2010, 11:59:15 am »
Quote from: Moonlyte on May 23, 2010, 11:54:40 am
i've got a question here:

State the characteristic which is described in each of the following statements about living things.  
Statement: The increase in size or number of cells of an organism.
Characterstic: ???

growth
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Offline Helium

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1556 on: May 23, 2010, 12:01:52 pm »
Quote from: ~VIN1094~ on May 23, 2010, 11:42:54 am
yea u cannot trust them .. anything might turn up .. its better u know everything ... :)

Yes i agree, dont take any chances of not studying anything,
Expect the unexpected. LOL :D
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Offline dodi23

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1557 on: May 23, 2010, 12:14:08 pm »
dont think so,, it only comes in p6's
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Offline Moonlyte

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1558 on: May 23, 2010, 01:02:07 pm »
Quote from: thenewkid™ on May 23, 2010, 11:59:15 am
growth

thanks...was thinking of in-depth stuff but it turned out to be the basic thing...hehe
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Offline guMnam

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1559 on: May 23, 2010, 01:26:12 pm »
okay is this organ transplant thingy in our syllabus
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