VCE Biology Question Thread

[vox nihili]

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

[Rishi97]

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

[Rishi97]

Are hormones excreted or secreted? What is the difference between these two terms?
Thanks 

[Frozone]

Are hormones excreted or secreted? What is the difference between these two terms?
Thanks 

Hormones are secreted through the blood.
Excretion refers to the removal of waste products eg faeces.

[Reus]

how is a signal amplified?
why is the signal amplification important?

[alchemy]

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]

Describe two mechanisms by which a hormone can bring about a cellular response. 

[alchemy]

Describe two mechanisms by which a hormone can bring about a cellular response. 

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

[vox nihili]

Describe two mechanisms by which a hormone can bring about a cellular response. 

Transcriptional
Physiological

There's your cue.

[Reus]

Key factors to be learnt for Immunology SAC?

[katiesaliba]

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?

[katiesaliba]

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...

[vox nihili]

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

[nerdmmb]

Are plant hormones transported by both the xylem and phloem?

[howlingwisdom]

Are plant hormones transported by both the xylem and phloem?

Yep!