First Unit 3 SAC?

[chisel]

Woohoo alright do you recall what results you took? I mean, did you take down results of the size of the potato cube, and compare the size of the cube in the hypertonic solution compared to the hypotonic solution?! I'd probably PM you closer to the date of my SAC. Thank you!!

Yeah no problem mate, anything you need I'd be glad to...
And yeah, we pretty much did what you said, and I remember we were given diagrams on the sac and asked which of these three diagrams is the isotonic solution from your experiment, and you would have to pick the potato that appears neutral in terms of the amount do water in it, but yeah the first SAC was easy to prepare for in terms of predicting questions, I pretty much predicted most of the SAC, just from common sense with my mate the night before it!

[Yacoubb]

I think my prep. for that SAC would be to basically revise the plasma membrane, fluid-mosaic model, transports across the membrane, generally what occurs in each process, energy-requirements, water and its make-up. I'd probably force questions out of my teacher as to what to revise, because often its almost (so I've been told) that after you write your report, the discussion is a mini-test on applying your knowledge from the plasma membrane and other concepts. E.g. drawing the plasma membrane, possibly being asked a question about cell organelles or plant cells and why the cell didn't burst in the hypotonic solution.. It is fairly predictable as you mentioned though

[Snorlax]

If anyone is incredibly bored or procrastinating, mind if you illustrate a plant cell in a hypotonic and hypertonic solution?
I'v done this last year but forgot how it looked like (i'm somewhat of a visual learner)
cheeeerrss

[pi]

[Snorlax]

Thanks, just for clarification, the green is the vacuole?
Also, What is Plasmolyzed? Isn't the process of a plant cell becoming flaccis called plasmolysis?

[chisel]

Thanks, just for clarification, the green is the vacuole?
Also, What is Plasmolyzed? Isn't the process of a plant cell becoming flaccis called plasmolysis?

no the blue thing is the vacuole, the green is the cytoplasm..
and plasymolzyed.. have no idea.. think it's irrelevant

[pi]

and plasymolzyed.. have no idea.. think it's irrelevant

The word might be irrelevant, but the concept is relevant.

[Snorlax]

(Image removed from quote.)

I just disagree with this image..
In an isotonic solution-how does a plant cell become flaccid?

[pi]

Flaccid means "normal" in this context: no net movement of water. What did you assume it meant?

edit: I do agree that they could have used a better word here

[Snorlax]

Flaccid means "normal" in this context: no net movement of water. What did you assume it meant?

edit: I do agree that they could have used a better word here

o_O i assumed flaccid meant "limp"- where when a plant cell is in a hypertonic solution
and in an isotonic solution, the plant cell would be normal (not turgid nor flaccid)

[pi]

Ok, my last post was a bit ambiguous and slightly misguided.

It's flaccid because normally plant cells are turgid, hence there is less water in the cell as per normal and therefore it is flaccid.

[Snorlax]

Ok, my last post was a bit ambiguous and slightly misguided.

It's flaccid because normally plant cells are turgid, hence there is less water in the cell as per normal and therefore it is flaccid.

If plant cells are normally turgid, what are they in a hypotonic solution?

[pi]

If plant cells are normally turgid, what are they in a hypotonic solution?

That's how they stay turgid...

[Tirana]

Mine was something involving beetroot and osmosis and cell plasma membranes back in the day.

Mine is exactly the same.

[ealam2]

do you have to write up a prac report? because when we did it i think it was just a PRAC SAC, where we had half the SAC to answer questions about the SAC and we had to apply knowledge to it, and the other half was general theory on osmosis and such

Not sure if we do. We'll have the SAC by week 5.