Which of the following is NOT a passive process?
facilitated diffusion
filtration
osmosis
vesicular transport
answer
vesicular transport
question
When the solutes are evenly distributed throughout a solution, we say the solution has reached _______.
permeability
velocity
diffusion
equilibrium
answer
equilibrium
question
Which of the following does NOT describe the plasma membrane?
semipermeable
impermeable
differentially permeable
selectively permeable
answer
impermeable
question
Which of the following requires a membrane-bound carrier for transport?
simple diffusion
facilitated diffusion
osmosis
filtration
answer
facilitated diffusion
question
Which of the following solutes would move the fastest?
albumin
glucose
urea
sodium chloride
answer
sodium chloride
question
For solutes that move by simple diffusion, which of the following does NOT affect the rate of simple diffusion across a membrane?
the membrane pore size
the potential energy of the solute
the concentration of the solute
the size of the solute
answer
the membrane pore size
the potential energy of the solute
question
In this activity, the solutes were transported through the dialysis membrane by _______.
facilitated diffusion
active transport
osmosis
simple diffusion
answer
simple diffusion
question
Through which membrane(s) would sodium chloride diffuse?
Through which membrane(s) would sodium chloride diffuse?
200 MWCO only
50 MWCO, 100 MWCO, and 200 MWCO
100 MWCO and 200 MWCO
20 MWCO, 50 MWCO, 100 MWCO, and 200 MWCO
answer
50 MWCO, 100 MWCO, and 200 MWCO
question
Which of the following statements about carrier proteins is FALSE?
They are found integrated into the plasma membrane.
They can become saturated if the maximum transport rate is exceeded.
They might have to change shape slightly to accommodate a solute.
They assist in simple diffusion.
answer
They assist in simple diffusion.
question
Which of the following statements about facilitated diffusion is FALSE?
The movement of the solute is passive.
The movement requires a carrier protein.
The movement of the solute is with its concentration gradient.
The movement of a given solute usually occurs in both directions (into and out of the cell).
Submit
answer
The movement of a given solute usually occurs in both directions (into and out of the cell)
question
Which of the following is NOT a reason why a solute would require facilitated diffusion?
The solute directly requires ATP for its transport.
The solute is too large to pass on its own.
The solute is lipid insoluble.
The solute is hydrophi
answer
The solute directly requires ATP for its transport.
question
Which of the following would increase the rate of facilitated diffusion
decreasing the concentration of solutes
increasing the steepness of the concentration gradient
decreasing the number of carrier proteins
increasing the amount of ATP available
answer
increasing the steepness of the concentration gradient
question
Simple diffusion and facilitated diffusion both _______.
require ATP
move solutes against their concentration gradient
move solutes with their concentration gradient
utilize a membrane-embedded carrier protein
answer
move solutes with their concentration gradient
question
Which of the following would decrease the rate of facilitated diffusion?
increasing the number of carrier proteins
decreasing the number of carrier proteins
decreasing the amount of ATP available
increasing the amount of ATP available
answer
decreasing the number of carrier proteins
question
What happens to facilitated diffusion when the protein carriers become saturated?
The transport rate will increase
ATP will be utilized for transport
The maximum rate of transport will occur.
The protein carriers fall apart.
answer
The maximum rate of transport will occur.
question
What happened when sodium chloride was added as a solute in the left beaker?
Sodium was cotransported with the glucose.
The transport rate of glucose increased.
There was no change in the transport rate of glucose.
The transport rate of glucose decreased.
answer
There was no change in the transport rate of glucose.
question
Which of the following statements about osmosis is FALSE?
It is specific for the movement of water.
Water moves toward the solution with the lowest concentration of solutes.
It is passive.
It is a type of diffusion.
answer
Water moves toward the solution with the lowest concentration of solutes
question
A Hypertonic solution:_______.
will induce cell shrinkage
will induce no net movement of water
will induce cell swelling
will induce cell bursting
answer
will induce cell shrinkage
question
If a membrane is impermeable to solutes, which of the following is true?
Water and solutes will move until equilibrium is reached.
Water will move toward the more concentrated solutes.
Water will move away from the concentrated solutes.
Osmosis will not occu
answer
Water will move toward the more concentrated solutes.
question
Osmotic pressure is measured in units of _______.
mm Hg
ml/min
mM/sec
mM/min
answer
mm Hg
question
Which of the following generated osmotic pressure?
glucose
sodium chloride
sodium chloride, glucose and albumin generated osmotic pressure.
albumin
answer
sodium chloride, glucose and albumin generated osmotic pressure.
question
Which of the following would result in NO change in osmotic pressure across a membrane?
The concentration of solutes is the same on both sides of the membrane.
The solutes can diffuse through the pores.
Water is moving with its concentration gradient.
The solutes can diffuse through the pores and the concentration of solutes is the same on both sides of the membrane.
answer
The solutes can diffuse through the pores and the concentration of solutes is the same on both sides of the membrane.
question
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?
Albumin and glucose diffuse through the membrane.
The net movement of water is toward the glucose.
The net movement of water is away from the albumin.
The net movement of water is toward the albumin.
answer
The net movement of water is toward the albumin.
question
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 solution is hypotonic.
The cell will shrink.
There is no net change in the movement of water into the cell.
The net movement of water is into the cell.
answer
The cell will shrink
question
Which of the following is required for filtration?
ATP
osmotic pressure
a hydrostatic pressure gradient
Both a membrane and a hydrostatic pressure gradient are required.
a membrane-embedded protein carrier
answer
Both a membrane and a hydrostatic pressure gradient are required.
question
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.
the pore size of the membrane
the MWCO of the membrane
the molecular weight of the solute
the size of the solute
answer
The molecular weight and size of the solute as well as the MWCO and pore size of the membrane.
question
An example of filtration occurs in the kidney and:
Ions and glucose filter from the capillary into the kidney tubule.
Red blood cells filter from the capillary into the kidney tubule.
This filtration across the capillary is an active process.
Plasma proteins filter from the capillary into the kidney tubule.
White blood cells filter from the kidney tubule into the capillary.
answer
Ions and glucose filter from the capillary into the kidney tubule.
question
Which of the following resulted in an increase in the filtration rate?
increasing the pore size
Both increasing the pore size and increasing the pressure above the beaker are correct.
increasing the concentration of the solutes
increasing the pressure above the beaker
Both increasing the pressure above the beaker and increasing the concentration of solutes are correct.
answer
Both increasing the pore size and increasing the pressure above the beaker are correct
question
Which solute did NOT appear in the filtrate using the 200 MWCO membrane?
Glucose, charcoal, sodium chloride and urea appeared in the filtrate.
charcoal
glucose
sodium chloride
urea
answer
charcoal
question
Which of the following was NOT observed during this activity?
Increasing the rate of filtration increased the concentration of solutes in the filtrate.
Some solutes were too large to pass through the membrane.
A residue of solutes remained on the membrane after filtration.
The 200 MWCO membrane was the largest pore size used.
answer
Increasing the rate of filtration increased the concentration of solutes in the filtrate
question
Increasing the pressure above the beaker is analogous to _______.
an increase in solutes found in the blood
a decrease in blood volume
an increase in heart rate
an increase in blood pressure
answer
an increase in blood pressure
question
Which of the following can be true of both active transport and facilitated diffusion?
The cell membrane pinches off to transport materials.
Solutes can move against their concentration gradient.
Lipid-insoluble solutes are transported across the membrane by a carrier protein.
A solute pump is required.
Cellular energy is required for the transport.
answer
Lipid-insoluble solutes are transported across the membrane by a carrier protein.
question
Coupled transporters that move solutes in the same direction are called _______.
symporters
uniporters
isoporters
antiporters
answer
symporters
question
Which of the following describes the concentration of ions when the cell is at rest?
The concentration of potassium and sodium is equal inside and outside the cell.
The concentration of potassium is higher outside the cell.
The concentration of potassium is higher inside the cell.
The concentration of sodium is higher inside the cell.
answer
The concentration of potassium is higher inside the cell.
question
Which of the following is the driving force for the sodium-potassium pump?
an electrical gradient
a concentration gradient
ATP hydrolysis
a hydrostatic pressure gradient
answer
ATP hydrolysis
question
The sodium-potassium pump can transport _______.
potassium even if sodium is not available
sodium even if potassium is not available and potassium even if sodium is not available
only if sodium and potassium are available
sodium even if potassium is not available
answer
only if sodium and potassium are available
question
Which of the following increased the rate of sodium-potassium transport?
adding glucose to the right beaker
increasing the amount of ATP
increasing the number of membrane pumps
decreasing the amount of ATP
answer
increasing the number of membrane pumps
question
Which of the following describes the movement of ions by the sodium-potassium pump?
Sodium is moved into the cell
Potassium is moved out of the cell.
Potassium is moved out of the cell and sodium is moved into the cell.
Potassium is moved into the cell.
answer
Potassium is moved into the cell.
question
What is the type of transport supplied by the glucose carriers in the activity?
endocytosis
coupled transport
exocytosis
facilitated diffusion
active transport
answer
facilitated diffusion
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