ACTIVITY ONE- Cell Transport Mechanisms and also Permeability: Simulating Dialysis (Simple Diffusion)

1. Describe two variables that impact the rate of diffusion.

You are watching: Which solute did not appear in the filtrate using any of the membranes? explain why.

Molecular weight affects the price of diffusion because the bigger the dimension of the molecule the longer it will take to diffusage. Membrane dimension is another variable that affects the rate of diffusion bereason if the membrane’s pores are tiny it will take molecules much longer to diffuse though it than if the pores were larger. Also, membrane thickness is a variable because the thinner the membrane the much faster the diffusion.


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2. Why execute you think the urea was not able to diffusage through the 20 MWCO membrane? How well did the results compare via your prediction?

Our prediction was that urea was not going to have the ability to diffusage via the 20 Molecular Weight Cut Off (MWCO) membrane bereason urea is too huge of a molecule to diffusage with the 20 MWCO membrane’s pores aren’t large sufficient for the urea to pass through.


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Our prediction was correct, the Urea was unable to diffuse though such a small membrane.

3. Describe the results of the attempts to diffuse glucose and also albumin through the 200 MWCO membrane. How well did the results compare through your prediction?

We predicted that glucose and also albumin would both diffuse very slowly via the 200 MWCO bereason they are big molecules. The outcomes were; the glucose diffused through the 200 MWCO membrane at a rate of 0.0040 per minute. The albumin was not able to diffusage via the 200 MWCO because it is as well huge of a molecule to fit with the membrane pore.


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4. Placed the following in order from smallest to biggest molecular weight: glucose, sodium chloride, albumin, and urea.

Sodium Chloride, Urea, Glucose, and also Albumin.

ACTIVITY 2- Cell Transport Mechanisms and Permeability: Simulated Facilitated Diffusion

1. Exordinary one means in which promoted diffusion is the very same as easy diffusion and one method in which it is different from simple diffusion.

Facilitated diffusion is the same as simple diffusion in that they are both passive and go down (or with) the concentration gradient. It is various from easy diffusion in that promoted diffusion offers a carrier protein to move it throughout the membrane.

2. The larger worth derived once more glucose carriers were existing corresponds to a rise in the price of glucose deliver. Exordinary why the price enhanced. How well did the results compare with your prediction?

The price of glucose that was transported boosted because when the concentration of glucose acquired better, so the price of diffusion went up. When tright here is a greater concentration gradient the price of diffusion rises, so the more glucose carriers made it much easier for the glucose to diffuse more easily though the membrane. We predicted that the rate of diffusion would certainly be slower because of more molecules, but the result was the opposite, and also at the moment we didn’t recognize around Fick’s Law of diffusion.

3. Exsimple your prediction for the impact Na+ Cl- could have on glucose transport. In various other words, describe why you picked the alternative that you did. How well did the results compare with your prediction?

We predicted that the glucose carry price would certainly increase. We predicted this because we assumed that through the aid of Na+Cl- it would certainly aid the glucose molecules diffusage with the membrane even more easily than without it. Our results matched our prediction. The Na+Cl- helped with the glucose though the membrane even more quickly.

ACTIVITY 3- Cell Transport Mechanisms and also Permeability: Simulating Osmotic Pressure

1.Explain the effect that raising the Na+ Cl- concentration had on osmotic pressure and also why it has actually this effect. How well did the outcomes compare with your prediction?

By boosting the Na+Cl- concentration we changed the concentration gradient in the water, which raised the osmotic pressure. Our results synchronized with our prediction because we believed that by including more Na+Cl- would increase the osmotic push and increase the price of diffusion.

2. Describe one method in which osmosis is equivalent to basic diffusion and also one method in which it is various.

Osmosis is equivalent to easy diffusion in that it is a passive diffusion and also moves down the concentration gradient. It is various bereason Osmosis takes place once tright here is a distinction in concentration gradient throughout a selectively permeable membrane.

3. Solutes are periodically measured in milliosmoles. Exordinary the statement, “Water chases milliosmoles.”

“Water chases milliosmoles” is referring to the diffusion of water or osmosis. Water moves though many membranes easily and also moves once tbelow is a change in water concentration between 2 sides of membrane; interpretation that water is chasing the concentration gradient.

4. The conditions were 9 mM albumin in the left beaker and 10 mM glucose in the appropriate beaker via the 200 MWCO membrane in location. Exsimple the outcomes. How well did the results compare via your prediction?

The results were that the albumin was not able to pass via the membrane because it is as well huge of a molecule, and also glucose passed though the membrane at a rate of 0.0044 per minute. The osmotic push for both was 153 L. Even through a high osmotic pressure albumin was still unable to pass though the 200MWCO membrane. We predicted that through a greater osmotic press both would certainly diffusage though the membrane, yet glucose was the one molecule that had the ability to diffuse via the membrane.

ACTIVITY 4- Cell Transport Mechanisms and also Permeability: Simulating Filtration

1. Exsimple in your own words why raising the pore size boosted the filtration rate. Use an analogy to support your statement. How well did the results compare via your prediction?

By raising the pore dimension in the membrane the filtration rate increased bereason more molecules were able to diffusage though the larger pres faster than smaller pores. Our prediction was that the rate of filtration would rise because the pores were bigger, enabling more molecules to pass the pores. In the kidneys, the membrane pores are larger which enables glucose and also urea to pass though the pores.

2. Which solute did not show up in the filtrate using any type of of the membranes? Explain why.

Powdered charcoal did not show up in any of the filtprices though the membranes because it is as well big of a molecule to pass though the pores of the membrane, even though the membrane pores are large; they weren’t big enough.

3. Why did increasing the pressure boost the filtration price yet not the concentration of solutes? How well did the outcomes compare through your prediction?

The rise of press made the filtration happen more quickly but did not change the concentration of the solutes because the pressure affects the rate at which it diffprovides through the filter, not the amountthat passes though the membrane. We predicted that the price would certainly boost.

ACTIVITY 5- Cell Transport Mechanisms and also Permeability: Simulating Active Transport

1. Describe the definition of using 9 mM sodium chloride inside the cell and 6 mM potassium chloride external the cell, rather of various other concentration ratios.

The meaning of utilizing those concentrations rather than other ratios is bereason for eexceptionally 3 Na+ ions that leave the cell, 2 K+ ions enter the cell. Also, we were able to see the price of diffusion

2. Explain why there was no sodium move even though ATP was current. How well did the outcomes compare through your prediction?

Tright here is more Na+ external the cell than inside the cell so Na+ tends to stay inside the cell unless it needs to be proactively transported out.

3. Exordinary why the addition of glucose carriers had actually no result on sodium or potassium carry. How well did the outcomes compare through your prediction?

Glucose carries had actually no effect on Na+ or K+ because glucose is transported individually.

4. Do you think glucose is being actively transported or transported by facilitated diffusion in this experiment? Explain your answer.

See more: There Are Two Closing Entries. The First One Is To Close _____; The Second One Is To Close _____.

Glucose is being actively transported in this experiment bereason the ATP that was there was supplied to move it.