Otago HSFY chat - archive

[Sam]

Yeah hopefully... google search isn't making it that much clearer either

I think I get it now, Isosmotic means it has the same number of solute on both sides. However Isotonic means the same number of non-permanent solutes. Because Urea can leave the cell it and there is not a lot of it inside the cell (according to the homework paper) it is non-permanent thus Isotonic doesn't apply.

I think that makes sense..

 

[Proshot]

I think I get it now, Isosmotic means it has the same number of solute on both sides. However Isotonic means the same number of non-permanent solutes. Because Urea can leave the cell it and there is not a lot of it inside the cell (according to the homework paper) it is non-permanent thus Isotonic doesn't apply.

I think that makes sense..

Sounds complex haha... I still can't get my head around it, maybe I'll wait until tomorrow when the lecturer clears it up. Though what you've said does seem logical enough from what I can comprehend

 

[Sam]

Sounds complex haha... I still can't get my head around it, maybe I'll wait until tomorrow when the lecturer clears it up. Though what you've said does seem logical enough from what I can comprehend

Heh yeah, he said he would clear it up for us tomorrow anyways. So tired, 8am ftl Just finished rewriting all my HUBs notes.. Not sure what else to do now!

 

[Proshot]

Heh yeah, he said he would clear it up for us tomorrow anyways. So tired, 8am ftl Just finished rewriting all my HUBs notes.. Not sure what else to do now!

Sleep? I'm going be struggling all night to think of a way to effectively study....I don't think it's really practical to just read the lecture slides over and over...any suggestions?

 

[Ruth]

The way I did it was to just jot down really quick notes using abbreviations then as soon as I got home rewrite the notes in a more formal form. This way you can concentrate on what he is saying + get some notes down. The guy beside me had like 3 whole written pages of notes! There's just no need to write down every little detail - e.g just to copy the slides word for word, waste of time IMO.

Dude I wrote nearly 5 pages of notes and I have tiny writing.
Personally that's how I learn though

 

[Sam]

Sleep? I'm going be struggling all night to think of a way to effectively study....I don't think it's really practical to just read the lecture slides over and over...any suggestions?

I read earlier in the thread that rewriting your notes without looking at them is a good idea. Then compare what you missed to what you wrote. For me personally writing something out makes it stick heaps more than simply reading.

 

[Sam]

Dude I wrote nearly 5 pages of notes and I have tiny writing.
Personally that's how I learn though

You crazy! I can't imagine the hand cramp

 

[Proshot]

I read earlier in the thread that rewriting your notes without looking at them is a good idea. Then compare what you missed to what you wrote. For me personally writing something out makes it stick heaps more than simply reading.

Right I might give that a shot when I have the time to... Still thinking about that isotonic/isosmotic question aghh

 

[Profiterole]

meh, at least she'll have the training of writing essays and other stuff for later use, while the rest of us will be dying of hand cramp and popping panadol like tic-tacs xD

 

[Proshot]

so true

 

[Sam]

meh, at least she'll have the training of writing essays and other stuff for later use, while the rest of us will be dying of hand cramp and popping panadol like tic-tacs xD

Ahaha, better get down to student health services and get a stronger prescription! I don't think we do much essay writing anyways? Maybe HEAL will be full of it. Gah!

 

[Proshot]

Oh hey lulwut If you go to discussion board in HUBS on blackboard I think you might find the answer, there are a few discussions on the whole isosmotic/isotonic homework question.

 

[Profiterole]

But don't we synthesise paracetamol at the end of chem in the labs? does that mean we get free panadol?

 

[SeeKay]

I think I get it now, Isosmotic means it has the same number of solute on both sides. However Isotonic means the same number of non-permanent solutes. Because Urea can leave the cell it and there is not a lot of it inside the cell (according to the homework paper) it is non-permanent thus Isotonic doesn't apply.

I think that makes sense..

Yeah, I agree with this. Isotonic apparently applies only to non-permeant solutes and it tells us that urea is permeable to cell membranes so you wouldn't be able to use that term. It's isosmotic because urea will just diffuse into the cell down it's conc. gradient so resulting in the same conc. in both the cell and solution. I THINK

 

[frootloop]

But don't we synthesise paracetamol at the end of chem in the labs? does that mean we get free panadol?

LOL. No, you don't get to eat it (They don't trust you to have made it properly).

 

[Sam]

Yeah, I agree with this. Isotonic apparently applies only to non-permeant solutes and it tells us that urea is permeable to cell membranes so you wouldn't be able to use that term. It's isosmotic because urea will just diffuse into the cell down it's conc. gradient so resulting in the same conc. in both the cell and solution. I THINK

Much more eloquently put than my explanation, glad we came to the same conclusion. Shall find out tomorrow heh

Anyways, sleep time. Goodluck with study everyone!

 

[Profiterole]

Much more eloquently put than my explanation, glad we came to the same conclusion. Shall find out tomorrow heh

Anyways, sleep time. Goodluck with study everyone!

What? sleep time???? its not even 10pm!!!! :blink:

 

[Sam]

What? sleep time???? its not even 10pm!!!! :blink:

Up since like 7am! Not used to it haha

 

[hermafish]

After reading what you guys have posted and the discussion board on hubs, i think i understand the isosmosis vs isotonic thing now too, thanks everyone

 

[juna]

Is it normal to be feeling overwhelmed? I feel like everything is so confusing and so many things to remember with its own little rules, and getting lost between lectures..... *sigh* And I see what they mean about keeping on top of things- I'm already lagging behind.

Someone mentioned that the ones in the book are A LOT harder than the actual exam ones. Have you looked at the previous exam papers on the physics website? They're much easier, largely just require plugging a few numbers into a formula and you're done.

If you're really struggling check out: Khan Academy - I watched those videos over summer and it helped a lot!

Thanks lulwut, I'll try that. And I managed to solve two problems without any help- that's rather insignificant, but still, its better than nothing.