1. What is the molecular weight of Na+ ?
The molecular weight of Na+ is 23.
2. What is the molecular weight of Cl- ?
The molecular weight of Cl- is 35.
3. Which MWCO dialysis membranes allowed both of these ions through?
The MWCOs that allowed both of these ions through were 50. 100 MWCO and 200 MWCO.
13. Which stuffs diffused from the left beaker to the right beaker?
NaCl. Urea. and Glucose were the stuffs that diffused from the left to the right beaker.
Which did non?
Albumin did non spread from the left to the right.
Why?
Albumin is a protein. which means it is a thicker substance. and the molecular weight was greater than the MWCO.
Activity 3Facilitated Diffusion
12. At a given glucose concentration. how does the sum of clip it takes to research equilibrium alteration with the figure of bearers used to “build” membrane?
At a given glucose concentration. the clip decreases as the bearers get more to “build” membrane.
Does the diffusion rate of Na+/Cl- alterations with the figure of receptors?
No the diffusion rate of Na+/Cl- does non alter with the figure of recpetors.
What is the mechanism of the Na+/Cl- conveyance?
Simple diffusion is the mechanism of the Na+/Cl- conveyance.
If you put the same sum of glucose in the right beaker as in the left. would you be able to detect any diffusion?
Yes. if you put the same sum of glucose in the right beaker as in the left. you would be able to detect diffusion.Department of energies being unable to detect diffusion needfully intend that…… . ?Yes. diffusion is taking topographic point.
Review Questions
1. Match each of the definitions in Column A with the appropriate term in Column B. Column A_e. Hypotonic__ term used to depict a solution that has a lower concentration of solutes compared to another solution. _g. Hypertonic__ term used to depict a solution that has a higher concentration of solutes compared to another solution. _a. Diffusion___the motion of molecules from an country of higher concentration to an country of lower concentration as a consequence of random thermic gesture. _d. active transport___ the motion of molecules across a membrance that requires the outgo of cellular energy ( ATP ) _c. Osmosis___ the conveyance of H2O across a semipermeable membrane. _f. Isotonic__ term used to depict two solutions tha have the same concentration of solutes relative to one another. _b. Facilitated diffusion___ the motion of molecules across a selectively permeable membrane with the assistance of specialised conveyance proteins.
Column Ba. DiffusionB. Facilitated diffusionc. Osmosisd. Active conveyancee. Hypotonicf. Isotonicg. Hypertonic
2. What is the chief difference between simple diffusion and facilitated diffusion?
The chief difference between simple diffusion and facilitated diffusion is that in facilitated diffusion a bearer protein is used.
3. What is the chief difference between facilitated diffusion and active conveyance?
The chief difference between facilitated diffusion and active conveyance is that in active conveyance the solutes are moved from an country of low concentration to an country of high concentration. which is the antonym of facilitated diffusion. Besides in facilitated diffusion adhering to a transporter is needed.
4. In the “Simple Diffusion” experiment. which solute ( s ) passed through the MWCO 20 membrane? Why?
None of the solutes passed through the MWCO 20 membrane because the solutes molecular weights were greater than the MWCO 20 membrane.
5. List three illustrations of inactive conveyance mechanisms. Three illustrations of inactive conveyance are osmosis. simple diffusion. and facilitated diffusion.
6. Describe the relationship of solute concentration to solvent concentration in osmosis.
The concentration of the solute is higher than the concentration of the dissolver when depicting the relationship in osmosis.
8. How can the concentration of H2O in a solution be decreased?
Increasing the solute will diminish the H2O concentration because the solution concentration is the opposite of the solvent concentration.
9. Suppose that a membrane separates a solution of higher osmolarity and a solution of lower osmolarity. To forestall osmotic flow of H2O across the membrane. force per unit area should be applied to which of the two solutions?
It should be applied to the higher osmolarity. The solution with the higher osmolarity has a higher concentration of solute and low concentration of H2O. which means this specific solution would necessitate to hold force per unit area present to barricade waterfront coming in from the solution of lower osmolarity.
10. What alteration in the cell volume will happen when a cell is placed in a hypotonic solution?
In a hypotonic solution the cell will spread out. The H2O will travel from the solution into the cell and if adequate H2O moves into the cell it will detonate.
11. What alteration in the cell volume will happen when a cell is placed in a hypertonic solution?
When a cell is placed in a hypertonic solution H2O will travel out of the cell. doing the cell to shrivel and decease.
12. By what mechanism does the active conveyance of sodium lead to osmotic flow of H2O across a membrane?
