PHYSIOEX 1
Through which membrane(s) would sodium chloride diffuse?
50 MWCO, 100MWCO, and 200 MWCO
Which of the following is the driving force for the sodium-potassium pump?
ATP hydrolysis
Which of the following is required for filtration?
Both a membrane and a hydrostatic pressure gradient are required.
Which of the following resulted in an increase in the filtration rate?
Both increasing the pore size and increasing the pressure above the beaker are correct.
Which of the following was NOT observed during this activity?
Increasing the rate of filtration increased the concentration of solutes in the filtrate.
An example of filtration occurs in the kidney and:
Ions and glucose filter from the capillary into the kidney tubule.
Which of the following can be true of both active transport and facilitated diffusion?
Lipid-insoluble solutes are transported across the membrane by a carrier protein.
Which of the following describes the movement of ions by the sodium-potassium pump?
Potassium is moved into the cell
A cell is immersed in a beaker of solution. The cell membrane is permeable to water but impermeable to solutes. If the intracellular concentration is 10 mM and the solution is 20 mM, which of the following is true?
The cell will shrink
Which of the following describes the concentration of ions when the cell is at rest?
The concentration of potassium is higher inside the cell.
What happens to facilitated diffusion when the protein carriers become saturated?
The maximum rate of transport will occur.
The presence or absence of a solute in the filtrate depends on _______.
The molecular weight and size of the solute as well as the MWCO and pore size of the membrane.
Which of the following statements about facilitated diffusion is FALSE?
The movement of a given solute usually occurs in both directions (into and out of the cell).
With the experimental conditions set at 10 mM glucose and 9 mM albumin, and the 200 MWCO membrane in place, which of the following is true?
The net movement of water is toward the albumin.
Which of the following is NOT a reason why a solute would require facilitated diffusion?
The solute directly requires ATP for its transport.
Which of the following would result in NO change in osmotic pressure across a membrane?
The solutes can diffuse through the pores and the concentration of solutes is the same on both sides of the membrane.
What happened when sodium chloride was added as a solute in the left beaker?
There was no change in the transport rate of glucose.
Which of the following statements about carrier proteins is FALSE?
They assist in simple diffusion.
Which of the following statements about osmosis is FALSE?
Water moves toward the solution with the lowest concentration of solutes.
If a membrane is impermeable to solutes, which of the following is true?
Water will move toward the more concentrated solutes.
Increasing the pressure above the beaker is analogous to _______.
an increase in blood pressure
Which solute did NOT appear in the filtrate using the 200 MWCO membrane?
charcoal
Which of the following would decrease the rate of facilitated diffusion?
decreasing the number of carrier proteins
When the solutes are evenly distributed throughout a solution, we say the solution has reached _______.
equilibrium
What is the type of transport supplied by the glucose carriers in the activity?
facilitated diffusion
Which of the following requires a membrane-bound carrier for transport?
facilitated diffusion
Which of the following does NOT describe the plasma membrane?
impermeable
Which of the following increased the rate of sodium-potassium transport?
increasing the number of membrane pumps
Which of the following would increase the rate of facilitated diffusion?
increasing the steepness of the concentration gradient
Osmotic pressure is measured in units of _______.
mm Hg
Simple diffusion and facilitated diffusion both _______.
move solutes with their concentration gradient
The sodium-potassium pump can transport _______.
only if sodium and potassium are available
In this activity, the solutes were transported through the dialysis membrane by _______.
simple diffusion
Which of the following solutes would move the fastest?
sodium chloride
Which of the following generated osmotic pressure?
sodium chloride, glucose and albumin generated osmotic pressure.
Coupled transporters that move solutes in the same direction are called _______.
symporters
For solutes that are membrane permeable, which of the following does NOT affect the rate of simple diffusion across a membrane?
the potential energy of the molecule, membrane pore size of the molecule
Which of the following is NOT a passive process?
vesicular transport
A Hypertonic solution:_______.
will induce cell shrinkage