La difusión simple y la facilitada se realizan a favor de una gradiante De concentracion o químico, eléctrico ó electroquímico) con lo que requiere aporte de. Escríbelo donde termina el inciso (Transporte activo primario, difusión facilitada, ósmosis, transporte activo secundario, difusión simple) a) Movimiento neto de. Distinguir entre la difusion simple, difusion facilitada y osmosis. 2. Comparar términos tales como, hipertónico, hipotónico e isotónico. 3. Demostrar los efectos .

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Post on Dec 42 views. Correr el Ejercicio N 1: Permeabilidad y mecanismos de transporte celular: Cell Transport Mechanisms and Permeability: The driving force for diffusion isYou correctly answered: In diffusion, molecules moveYou correctly favilitada Which of the following dialysis membranes has the largest pore size?

Avogadro’s number is a constant for the number ofYou correctly answered: The molecular weight of urea is Do you think urea will diffuse through the 20 MWCO membrane?

No, not at all. Which of the following will be able to diffuse through the MWCO membrane?

The reason sodium chloride didn’t diffuse left to right is thatYou correctly answered: Glucose is a six-carbon sugar. Albumin is a protein with amino acids. The rate of diffusion for ureaYou correctly answered: The effect of increasing the concentration of sodium chloride from 9 mM to 18 mM in the left beaker was toYou correctly answered: Describe the difference between smple rate of diffusion seen for sodium and urea.

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Urea diffused more slowly because it is larger than sodium. Which of the following solutes fcailitada not pass through any of the membranes? When facklitada stops, we say the solution has reachedYou correctly answered: Describe two variables that affect the rate of diffusion.

Why do you think the urea was not able to diffuse through the 20 MWCO membrane? How well did the results comparewith your prediction? Describe the results of the attempts to diffuse glucose and albumin through the MWCO membrane.

How well did theresults compare with your prediction? Put the following in order from smallest to largest molecular weight: Orden de moleculas de menor a mayor peso molecular: Molecules need a carrier protein to difusuon them move across a membrane becauseYou correctly answered: Which of the following is true of facilitated diffusion?

Movement is passive and down a concentration gradient.


Examples of solutes that might require facilitated diffusion includeYou correctly answered: Which of the following would not affect the rate of facilitated diffusion? What faccilitada do you think increasing the number of protein carriers will have on the glucose transportrate? The glucose transport rate will increase.


There will be no change in the glucose transport rate. What happened to the glucose transport rate when the glucose concentration was increased from 2 mM to8 mM? The glucose transport rate increased. Describe the conditions that resulted in the fastest rate of glucose transport. The membrane proteins were saturated. Run Number Solute Start Conc.

R Carriers Rate1 Glucose 2. What variable s increased the rate of facilitated diffusion of glucose? For facilitated diffusion, increasing the concentration of glucose on one side of the membrane is the same as You correctly answered: When all of the membrane carriers are engaged, or busy, we say they areYou correctly answered: Explain one way in which facilitated diffusion is the same as simple diffusion and one way in which it is different fromsimple diffusion.

The larger value obtained when more glucose carriers were present corresponds to an increase in the rate of glucosetransport. Explain why the rate increased.

How well did the results compare with your prediction? In other words, explain why you pickedthe choice that you did.

Which of the following is true of osmosis? It is a type of diffusion. Which of the following occurs when a simle solution is added to cells? The variable that affects osmotic pressure isYou correctly answered: The net movement of water would be into the cell in a You correctly answered: What do you think will be the pressure result of the current experimental conditions?

Why do you think there is no pressure change? Sodium is able to diffuse through the pores. Why do you think there was no pressure change? There is no net movement of water because the solute concentrations are the same. If you double the concentration of facilirada nondiffusible solute that is on one side of a membrane, the osmotic pressure willYou correctly answered: When a solute is able to diffuse through a membraneYou correctly answered: Water diffusesYou correctly answered: How welldid the results compare with your prediction?

Describe one way in which osmosis is similar to simple diffusion and one way in which it is different. Solutes are sometimes measured in milliosmoles. Explain the statement, Water chases milliosmoles.


The conditions were 9 mM albumin in the left beaker and difuion mM glucose in the right beaker with the MWCOmembrane in place. Filtration is a process that You correctly answered: Filtration is dependent upon aYou correctly answered: The filtrateYou correctly answered: All of these answers are correct. An important place that filtration takes place in the body is inYou correctly answered: What effect will increasing the pore size of the filter have on the filtration rate?


The filtration rate will increase. What will happen if you increase the pressure above the beaker the driving pressure? The reason none of the solutes were present in the filtrate was thatYou correctly answered: What does an increase in the driving pressure correspond to in the body?

After filtration, substances that pass through the filter are called the filtrate, which includesYou correctly answered: The top beaker in the simulation corresponds toYou correctly answered: Facipitada of the solute remained on the membrane filter. Explain in your own words why increasing the pore size increased the filtration rate.

T an analogy to support yourstatement. Which solute did not appear in the filtrate using any of the membranes? Why did increasing the pressure increase the filtration rate but not the concentration of solutes? How well did the resultscompare with your prediction? The sodium-potassium pump is classified as a n You correctly answered: Solutes that require active transport for movement might be too large to pass or might eifusion correctly answered: What do you think will result from these experimental conditions?

Do you think the addition of glucose carriers will affect the transport of sodium or potassium? No, it will not affect the transport of either ion. Why did the sodium transport stop before the transport was completed?

The ATP was depleted. Why was the equilibrium for the solutes reached earlier? There were more pumps for transport. What happened when you increased the amount of ATP dispensed with the same concentration of sodium andpotassium on either side of the membrane? More ions were transported. At what concentration of ATP were the sodium and potassium maximally transported? Transport of the ions was faster.