Question

practice: putting it all together
part 1: fill in the blank

1. what property of the cell membrane allows some molecules to pass easily through, but not all?
2. because the cell membrane is made of 2 layers of lipids it is called a
3. what is the transport of water across the cell membrane called?
4. transport that moves materials against the concentration gradient is said to be

part 2: analyze the pictures
in numbers 5 - 7, label the type of transport pictured, add arrows to the picture to show movement, and write a sentence describing what will happen to the cell.

1. type of transport: description:

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h₂o

1. type of transport: description:
2. type of transport: description:

part 3: matching

1. used in active transport but not passive transport. a. protein channel
2. process of taking in materials using a vesicle. b. hypotonic
3. solution that causes water to rush out of the cell. c. isotonic
4. can be used in both active and passive transport. d. hypertonic
5. process of removing substances from the cell using a vesicle. e. molecular pumps
6. when the osmotic concentration is the same inside and outside of the cell. f. exocytosis
7. solution that causes a cell to swell and potentially lyse (burst.) g. endocytosis
8. transport of ions across the cell membrane. h. energy

Explanation:

Part 1: Fill - in - the - Blank

Step1: For question 1

The cell - membrane property that allows some molecules to pass through and not all is called selective permeability.

Step2: For question 2

A cell membrane made of 2 layers of lipids is called a lipid bilayer.

Step3: For question 3

The transport of water across the cell membrane is called osmosis.

Step4: For question 4

Transport that moves materials against the concentration gradient is called active transport.

Part 2: Analyze the Pictures

Step5: For question 5

If the picture shows water molecules moving across the cell membrane, the type of transport is osmosis. The description could be: Water moves across the cell membrane from an area of high water concentration to an area of low water concentration.

Step6: For question 6

If the picture shows molecules moving from an area of high concentration to an area of low concentration through the cell membrane without the use of energy, the type of transport is passive transport (diffusion if it's a non - polar molecule). The description could be: Molecules move down their concentration gradient through the cell membrane without the use of energy.

Step7: For question 7

If the picture shows molecules moving through a protein channel from an area of high concentration to an area of low concentration, the type of transport is facilitated diffusion. The description could be: Molecules move down their concentration gradient through a protein channel in the cell membrane.

Part 3: Matching

Step8: For question 8

Used in active transport but not passive transport is Energy (H).

Step9: For question 9

The process of taking in materials using a vesicle is Endocytosis (G).

Step10: For question 10

A solution that causes water to rush out of the cell is Hypertonic (D).

Step11: For question 11

Can be used in both active and passive transport is Protein channel (A).

Step12: For question 12

The process of removing substances from the cell using a vesicle is Exocytosis (F).

Step13: For question 13

When the osmotic concentration is the same inside and outside of the cell is Isotonic (C).

Step14: For question 14

A solution that causes a cell to swell and potentially lyse (burst) is Hypotonic (B).

Step15: For question 15

Transport of ions across the cell membrane can be done by Molecular pumps (E).

Answer:

1. Selective permeability
2. Lipid bilayer
3. Osmosis
4. Active transport
5. Osmosis; Water moves across the cell membrane from an area of high water concentration to an area of low water concentration.
6. Passive transport (Diffusion); Molecules move down their concentration gradient through the cell membrane without the use of energy.
7. Facilitated diffusion; Molecules move down their concentration gradient through a protein channel in the cell membrane.
8. H. Energy
9. G. Endocytosis
10. D. Hypertonic
11. A. Protein channel
12. F. Exocytosis
13. C. Isotonic
14. B. Hypotonic
15. E. Molecular pumps