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March 29, 2024, 10:56:21 pm

Author Topic: VCE Biology Question Thread  (Read 3571692 times)  Share 

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Burt Macklin

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Re: VCE Biology Question Thread
« Reply #1440 on: April 16, 2014, 07:20:08 pm »
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The condensation reaction refers to two molecules combining together to form one, with the release of a water molecule.

In relation to biomacromolecules, monomers (amino acids, monosaccharides, nucleotides) will undergo condensation reactions to form polymers. E.g. two amino acids will join by condensation reaction, releasing a water molecule in the process
Polymerisation reactions produce water as a biproduct. That's condensation. An organic reaction that produces water.

Thanks to both of you for clearing this up!  :D

MM1

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Re: VCE Biology Question Thread
« Reply #1441 on: April 16, 2014, 07:40:15 pm »
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Are we required to know about all the types of white blood cells? Thanks!

gohfish

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Re: VCE Biology Question Thread
« Reply #1442 on: April 16, 2014, 07:49:19 pm »
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I would focus on B and T lymphocytes, macrophages and mast cells (and a bit on natural killer cells). No need to make distinctions between neutrophils, basophils, eosinophils etc, but be aware that they exist

howlingwisdom

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Re: VCE Biology Question Thread
« Reply #1443 on: April 16, 2014, 08:17:17 pm »
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What would you say are the major differences between the nervous system and the endocrine system?
VCE: 2014-2015 (English Language, Maths Methods, Biology, Chemistry, French, Latin)

2016: BMedSt + MD at Bond University (2020)

vox nihili

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Re: VCE Biology Question Thread
« Reply #1444 on: April 16, 2014, 08:20:54 pm »
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What would you say are the major differences between the nervous system and the endocrine system?

Endocrine signals by definition have to travel through blood, neural signals travel through neurones.
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howlingwisdom

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Re: VCE Biology Question Thread
« Reply #1445 on: April 16, 2014, 08:28:42 pm »
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Are plant hormones typically water-soluble?
VCE: 2014-2015 (English Language, Maths Methods, Biology, Chemistry, French, Latin)

2016: BMedSt + MD at Bond University (2020)

alchemy

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Re: VCE Biology Question Thread
« Reply #1446 on: April 16, 2014, 08:32:18 pm »
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What would you say are the major differences between the nervous system and the endocrine system?

Mode of transport (hormones travel through blood, neural signals travel through neurons, as Mr.T-Rav said), and the action of hormones is slower but more prolonged while action of nerve cells is more short lived but rapid. Good question you asked because it's very relevant.

Are plant hormones typically water-soluble?

Not all of them are. For example, Ethylene is a gas so it's molecules are already separate from each other.

nerdmmb

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Re: VCE Biology Question Thread
« Reply #1447 on: April 16, 2014, 09:58:41 pm »
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Heart rate increases when blood pressure falls.

Does this mean that when blood pressure increases, the body responds by decreasing heart rate?

Thanks! :)

nerdmmb

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Re: VCE Biology Question Thread
« Reply #1448 on: April 16, 2014, 10:38:09 pm »
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Also, how does thyroxin reduce heat loss?

MM1

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Re: VCE Biology Question Thread
« Reply #1449 on: April 16, 2014, 11:15:30 pm »
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Heart rate increases when blood pressure falls.

Does this mean that when blood pressure increases, the body responds by decreasing heart rate?

Thanks! :)

An increased heart rate causes the blood pressure to increase.

Also, how does thyroxin reduce heat loss?

I believe thyroxine actually increases heat loss which is the result of an increased metabolism :)

MM1

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Re: VCE Biology Question Thread
« Reply #1450 on: April 16, 2014, 11:17:31 pm »
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Can someone please differentiate between active and passive acquired induced immunity? Thanks!

gohfish

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Re: VCE Biology Question Thread
« Reply #1451 on: April 17, 2014, 12:01:48 am »
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Induced active immunity is acquired through vaccination with a dead or attenuated pathogen. The body's immune system responds to the pathogenic antigens by producing specific antibodies against it. The body producing it's OWN antibodies is what makes it active. Since the antibodies are produced by the body, memory of the pathogen is retained (B and T memory cells made)

Induced passive immunity is acquired through injection of antibodies from an external source. The body does not make it's own antibodies and so this immunity is passive. No B or T memory cells are made.


MM1

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Re: VCE Biology Question Thread
« Reply #1452 on: April 17, 2014, 12:16:36 am »
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Induced active immunity is acquired through vaccination with a dead or attenuated pathogen. The body's immune system responds to the pathogenic antigens by producing specific antibodies against it. The body producing it's OWN antibodies is what makes it active. Since the antibodies are produced by the body, memory of the pathogen is retained (B and T memory cells made)

Induced passive immunity is acquired through injection of antibodies from an external source. The body does not make it's own antibodies and so this immunity is passive. No B or T memory cells are made.

Thanks! :)

Rishi97

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Re: VCE Biology Question Thread
« Reply #1453 on: April 17, 2014, 09:25:10 am »
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Could someone please explain cellular respiration in the easiest terms possible?
All the arrows in the diagrams and the values of the inputs and outputs are really confusing me :(
Much appreciated ;D
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katie101

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Re: VCE Biology Question Thread
« Reply #1454 on: April 17, 2014, 09:55:13 am »
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What are the two large lobes of the brain called?