What about ex 5b?

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activity 2 pg 20
what occurs in the muscle during this apparent lack of activity?

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3. The following refer to Activity 3: Simulating Osmotic Pressure.

For NaCl, which MWCO membrane(s) provided for the net movement of water without movement of NaCl?

20 MWCO

Explain how you determined this. (Hint: Correlate your results to the data in Chart 3.)

Buildup of osmotic pressure due to the presence of non-diffusable NaCl in the solution causes water to diffuse down its concentration gradient.

For glucose, which MWCO membrane(s) provided for the net movement of glucose without net movement of water?

200 MWCO

Explain how you determined this.

There was no buildup of osmotic pressure, which indicates that glucose is able to diffuse down its concentration gradient.

Is osmotic pressure generated if solutes diffuse freely?

No

Explain how the solute concentration affects osmotic pressure.

The higher the solute concentration, the higher the osmotic pressure.

Here is the first section for those who needed it as well

Simple Diffusion

1. The following refer to Activity 1: Simulating Dialysis (Simple Diffusion).

•   Which solute(s) were able to pass through the 20 MWCO membrane?
None
•   According to your results, which solute had the highest molecular weight?
Albumin
•   Which solute displayed the highest rate of diffusion through the 200 MWCO membrane?
NaCl
•   Using the data from Chart 1, explain the relationship between the rate of diffusion and the size of the solute.
The smaller the solute’s molecular weight, the faster it’s rate of diffusion will be.
Facilitated Diffusion

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