Biology Question, TOP SCORE...

[Toothguy80]

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When the cytoplasm of a cell has a lower concentration than the extracellular medium, the medium is said to be......

Top Score Answer:
Hypertonic to the cell and H2O will flow out of the cell.

What does this mean? concentration of solute, solvent. Im thinking that the cytoplasm has less conc. if solute and the medium has more, so the medium is hypertonic but why does water exit the cell, shouldnt it exit the cytoplasm?

I dont get it...someone please explain...thanks

 

[Ocean5]

What does this mean? concentration of solute, solvent.

It means conc of solute.

Im thinking that the cytoplasm has less conc. if solute and the medium has more, so the medium is hypertonic but why does water exit the cell, shouldnt it exit the cytoplasm?

I dont get it...someone please explain...thanks

Cytoplasm is inside the cell. So when it says water exits the cell, it means that it exits the cytoplasm also.

 

[Decan]

When the cytoplasm of a cell has a lower concentration than the extracellular medium, the medium is said to be......

Top Score Answer:
Hypertonic to the cell and H2O will flow out of the cell.

What does this mean? concentration of solute, solvent. Im thinking that the cytoplasm has less conc. if solute and the medium has more, so the medium is hypertonic but why does water exit the cell, shouldnt it exit the cytoplasm?

I dont get it...someone please explain...thanks

Think of it as a concentration gradient of water (solvent). If the concentration of solutes is less in the cells, it also means that it has a lot of water. Since the concentration of solutes is larger outisde, that means that there is less water in the medium. So, water will go from high conc. to low conc. and flow out of the cell causing it to crenate.

 

[IsRaEl21]

If I would be you I would use the Destroyer and the achiever. The explanation in the destroyer are very helpful and are very in depth. After the destroyer you should practice some achiever exams, and I am sure you will be just fine on the exam data.

 

[Toothguy80]

does destroyer explain this specific problem?
I read it and didn't find this.

So this is the way Im thinking about this problem, let me know if Im right.

Cytoplams: low solute conc. => high H2O conc.
Medium: high solute conc. => low H2O conc.

all the solute(salts, crap) enter the cytoplasm => medium is hypertonic to cytoplasm which is the cell and since H2O exits the cytoplasm, then it exits the cell, right?

How come the H2O exited doesnt just stay inside the medium, it's still inside the cell, right?

Aren't the cytoplasm and medium in the CELL?

Jesus christ, Im going to be so happy to get rid of this test.

 

[laundry]

I'll try to use my wonderful skillzz to illustrate...

X's represent the solute particles. Water always moves in direction of greater number of particles = great concentration...hense osmosis...

So,

ICF (intracellular fluid) | ISF (Interstitial fluid)
x x | x x x x x
x ---|---> x x x
x | x x x x x
x | x x x

😀

 

[Dotoday]

The water flows from low concentration of solute to high soncentration of solute. However the solute flows from High to low. So, if the concentration of solute is higher outside of the cell than inside of the cell, the solution outside of the cell is Hypertonic and the solution inside the cell is Hypotonic. Water will simply flow out of the cell to dilute the concentration of solute outside of the cell. The high concentration of solute simply draws water towards itself like a magnet. That is the way how dialyses bags work.
I hope that make sense. Good luck.

 

[Toothguy80]

Awesome, Got it

 

[AaBbZz]

I don't know if this will help you but the way that I think about it which is that concentration (moles/Liter) of cytoplasm is low meaning there is less moles of substance than water (aka lots of water inside the cell)

Compare that with extracellular enviroment which has a high concentration (Lots of moles of stuff and less water)

The cell membrane is SELECTIVELY PERMEABLE meaning water is the only thing moving in and out so just compare the water movement: High inside the cell, Low outside the cell water is going to Flow out.

To Quickly translate that to Hypo or Hypertonic solution remember Hypotonic causes water to flow in like a HIPPO. The other (Hypertonic) causes water to flow out.

The Hippo analogy really helps for doing these problems easily🙂