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November 01, 2024, 10:15:55 am

Author Topic: VCE Biology Question Thread  (Read 3889131 times)  Share 

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vox nihili

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Re: VCE Biology Question Thread
« Reply #1665 on: May 06, 2014, 09:26:43 pm »
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First remember "there's type I and type II diabetes.
type I - is an autoimmune disease where your immune system destroy cells that produce insulin, and as a result you must take insulin shots (as you're unable to produce it)
type II - is when your cells don't respond to insulin or insulin isn't produced enough, so your cells are unable to take up glucose" (Quote: swagsxboi)

Since production of insulin is less in Group X, and there is also a greater amount of blood glucose in Group X, this would have meant cells of the body would have taken up less glucose over the period of 60 minutes in comparison to Group Y. Hence, Group X must have included the people with diabetes.

Otherwise perfect :)
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Rishi97

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Re: VCE Biology Question Thread
« Reply #1666 on: May 06, 2014, 09:27:19 pm »
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First remember "there's type I and type II diabetes.
type I - is an autoimmune disease where your immune system destroy cells that produce insulin, and as a result you must take insulin shots (as you're unable to produce it)
type II - is when your cells don't respond to insulin or insulin isn't produced enough, so your cells are unable to take up glucose" (Quote: swagsxboi)

Since production of insulin is less in Group X, and there is also a greater amount of blood glucose in Group X, this would have meant cells of the body would have taken up less glucose over the period of 60 minutes in comparison to Group Y. Hence, Group X must have included the people with diabetes.

Great explanation. Thanks heaps :)
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Rishi97

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Re: VCE Biology Question Thread
« Reply #1667 on: May 07, 2014, 05:25:55 pm »
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Are hormones excreted or secreted? What is the difference between these two terms?
Thanks  ;D
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Frozone

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Re: VCE Biology Question Thread
« Reply #1668 on: May 07, 2014, 05:56:18 pm »
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Are hormones excreted or secreted? What is the difference between these two terms?
Thanks  ;D
Hormones are secreted through the blood.
Excretion refers to the removal of waste products eg faeces.
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Reus

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Re: VCE Biology Question Thread
« Reply #1669 on: May 07, 2014, 08:39:24 pm »
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how is a signal amplified?
why is the signal amplification important?
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alchemy

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Re: VCE Biology Question Thread
« Reply #1670 on: May 07, 2014, 10:16:44 pm »
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how is a signal amplified?
why is the signal amplification important?

A signal is amplified through the 'signal transduction' process. It's done so that the cell can produce a response. Otherwise, the stimulus won't be of a sufficient intensity for the cell to detect it and produce a response.

Rishi97

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Re: VCE Biology Question Thread
« Reply #1671 on: May 08, 2014, 07:02:45 pm »
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Describe two mechanisms by which a hormone can bring about a cellular response.  :D
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alchemy

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Re: VCE Biology Question Thread
« Reply #1672 on: May 08, 2014, 10:48:18 pm »
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Describe two mechanisms by which a hormone can bring about a cellular response.  :D

I remember doing this question sometime ago; the wording is slightly ambiguous IMO
However, I think the question refers to 'signal transduction'. That would mean you'd have to mention that protein hormones bind to receptors on the cell membrane and trigger a second messenger to carry their message into the cell, whereas lipid hormones bind to receptors in the cytosol to cause signal transduction to occur so that a cellular response can be reached.

NOTE: This is probably incorrect! :c
« Last Edit: May 09, 2014, 07:16:03 am by alchemy »

vox nihili

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Re: VCE Biology Question Thread
« Reply #1673 on: May 08, 2014, 10:57:44 pm »
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Describe two mechanisms by which a hormone can bring about a cellular response.  :D
Transcriptional
Physiological

There's your cue.
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Reus

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Re: VCE Biology Question Thread
« Reply #1674 on: May 09, 2014, 04:42:30 pm »
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Key factors to be learnt for Immunology SAC?
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katiesaliba

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Re: VCE Biology Question Thread
« Reply #1675 on: May 10, 2014, 05:17:25 pm »
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A person sees a snake and as a result their heart rate increases.

Is this not an example of homeostasis because there is no negative feedback involved? It would only be considered negative feedback if the response was to run away, right? The sympathetic nervous system is effected due to adrenaline acting as a neurotransmitter. Positive feedback wouldn't be involved because more snakes aren't produced lol. I'm just trying to figure out the nature of response that would occur. Could it just be a response model type of outcome?
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katiesaliba

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Re: VCE Biology Question Thread
« Reply #1676 on: May 10, 2014, 05:20:29 pm »
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Are NEAP tests generally harder than VCAA exams? I'm doing one now and compared to past exam questions that I've done, the NEAP tests seem really hard...
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vox nihili

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Re: VCE Biology Question Thread
« Reply #1677 on: May 10, 2014, 05:20:52 pm »
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Are NEAP tests generally harder than VCAA exams? I'm doing one now and compared to past exam questions that I've done, the NEAP tests seem really hard...

Yeah they are absolutely
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Re: VCE Biology Question Thread
« Reply #1678 on: May 10, 2014, 10:32:33 pm »
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Are plant hormones transported by both the xylem and phloem?

howlingwisdom

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Re: VCE Biology Question Thread
« Reply #1679 on: May 10, 2014, 10:37:09 pm »
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Are plant hormones transported by both the xylem and phloem?
Yep! :)
VCE: 2014-2015 (English Language, Maths Methods, Biology, Chemistry, French, Latin)

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