BSCS Biology: A Molecular Approach

Chapter 3: Exchanging Materials with the Environment

How Cells Exchange Materials

1.
The movement of the dark substance throughout the glass of water, as shown here, is an example of what process?

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A)concentration
B)diffusion
C)osmosis
D)turgor
2.
What is turgor?
A)A difference in concentration across a distance.
B)The movement of water through cell membranes.
C)The outward pressure of a cell against its cell wall.
D)A waste removal process.
3.
Which of the following involves the movement of substances across cell walls against their concentration gradients?
A)passive transport
B)endocytosis
C)facilitated diffusion
D)active transport
4.
The movement of very large molecules into a cell often takes place via a folding of the membrane called ____.
A)exocytosis
B)facilitated diffusion
C)active transport
D)endocytosis
5.
Exocytosis helps cells do what?
A)relieve turgor
B)obtain food
C)remove waste materials
D)obtain nitrate
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