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Study Quiz Section 8.2
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1

Which of the following statements is NOT true about a cell membrane?
A)It controls the movement of all materials in and out of the cell.
B)It protects the cell from its surroundings.
C)It filters the material that can enter and leave the cell.
D)It can move materials in or out against a concentration gradient.
2

What is the random constant movement of particles in a fluid called?
A)Brownian motion
B)Gaussian motion
C)Cyclonic motion
D)Random motion
3

What is the key difference between active transport and passive transport?
A)Each requires movement down a concentration gradient.
B)Each requires movement up a concentration gradient.
C)Proteins are necessary for active transport.
D)They all help transport large molecules.
4

What is the best description of diffusion?
A)Movement of particles from an area of lower concentration to an area of higher concentration.
B)Movement of particles from an area of higher concentration to an area of lower concentration.
C)Movement of water particles from an area of lower concentration to an area of higher concentration.
D)Movement of water particles from an area of higher concentration to an area of lower concentration.
5

What is the best description of a hypotonic solution?
A)It is made up of equal parts of water and solutes.
B)It is made up of a higher quantity of solutes than water.
C)It has no solute in it at all.
D)It is made up of a lower quantity of solutes than water.
6

In the following illustration, the blue dots represent water and the green dots represent glucose.
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What should begin to happen in this picture?
A)The water molecules should flow from the left side to the right side in an effort to dilute the glucose.
B)The glucose should flow from the right side to the left side to try and reach equilibrium.
C)Everything should stay the same.
D)The water should flow from the right side to the left in an effort to get all of the water on the same side of the membrane.
7

The movement of water across this type of membrane is called
A)diffusion
B)transpiration
C)osmosis
D)dehydration
8

Freshwater fish are constantly surrounded by a solution that is lower in solutes than their cells. What must they have in order to combat this?
A)a method for increasing the absorption of water
B)a method for decreasing the absorption of solutes
C)a method for decreasing the absorption of water
D)nothing special
9

If a cell were placed into an unknown solution and swelled up to twice its normal size after a period of time, what would we know about the solution?
A)The solution has a high concentration of solutes.
B)The solution has a low concentration of solutes.
C)The solution has an equal concentration of water and solutes.
D)The solution has the same concentration of solutes as inside of the cell.
10

Which of the following molecules cannot diffuse through the cell membrane?
A)water
B)oxygen
C)carbon dioxide
D)glucose
11

Diffusion and osmosis are used in a number of technologies every day. Which of the following is NOT an example of a technology that uses either diffusion or osmosis?
A)water treatment
B)water purification
C)kidney dialysis
D)nicotine patches





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