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CHAPTER 4 Cell Transport
Practice Test
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The concentration of many types of substances
1 The concentration of many types of substances eventually becomes balanced on both sides of a membrane this is called isotonic
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from an area of high concentration to an area of low concentration
2 Diffusion takes place from an area of high concentration to an area of low concentration
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Refer to the illustration above
Refer to the illustration above. Which cell is most likely to lose both water molecules and solute molecules as the system approaches equilibrium? 3 cell 4
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Refer to the illustration above
Refer to the illustration above. In this system, solute molecules in cell 2 are most likely to 3 diffuse into cell 1
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Refer to the illustration above
Refer to the illustration above. In which direction are water molecules in this system most likely to diffuse? 3 from 3 to 1
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The dispersal of ink in a beaker of water is an example of
4 The dispersal of ink in a beaker of water is an example of diffusion.
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Channels utilizing facilitated diffusion
5 Channels utilizing facilitated diffusion work in two directions.
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It moves substances against a concentration gradient
6 Which of the following is not characteristic of facilitated diffusion? a. It requires a carrier protein. b. It moves substances against a concentration gradient. c. It requires no energy input. d. It involves a change in the shape of its carrier. It moves substances against a concentration gradient
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7 Which of the following enters a cell by active transport? a. glucose b. water c. lactose d. potassium ion potassium ion
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8 The process by which water passes into or out of a cell through a membrane is called osmosis.
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The sodium-potassium pump usually pumps
9 The sodium-potassium pump usually pumps potassium into the cell
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10 Ridding the cell of material by discharging it from sacs at the cell surface is called exocytosis
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11 Molecules that are too large to be moved through the membrane can be transported into the cell by endocytosis
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A calcium ion channel will allow
12 A calcium ion channel will allow only calcium ions to pass through it.
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ATP stores energy for cells to use in the bonds between its
12 ATP stores energy for cells to use in the bonds between its phosphates
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The process shown is called
12 The process shown is called Diffusion No membrane is involved
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13 Refer to the illustration above. The process shown in figure Y is called ____________________. exocytosis
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13 The process in which an amoeba engulfs its prey and takes it in is known as ____________________. phagocytosis
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13 Refer to the illustration above. Cells often trap extracellular particles and fluid. This is shown in figure ____________________. X
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29 The END
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The End
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