Cell Transport

Question 1

What term describes the movement of molecules from an area of low concentration to an area of high concentration?

Answer 1

active transport

Question 2

What term describes a solution or the environment outside the cell when it has a higher concentration of dissolved materials than inside the cell.

Answer 2

hypertonic

Question 3

During osmosis, which way will water move if the concentration of dissolved materials outside the cell is lower than the concentration of dissolved materials inside the cell?

Answer 3

Water moves into the cell, causing it to swell.

Question 4

During osmosis, which way will water move if the concentration of dissolved materials outside the cell is greater than the concentration of dissolved materials inside the cell?

Answer 4

Water will move out of the cell, causing it to shrink.

Question 5

What term describes the movement of materials from an area of high concentration to an area of low concentration?

Answer 5

diffusion

Question 6

What is the state in which the concerntrations of the diffusing molecules are the same or become equal?

Answer 6

equilibrium

Question 7

Does diffusion require energy?

Answer 7

No. It is a form of passive transport.

Question 8

What general term describes the movement of materials across the cell membrane without energy?

Answer 8

passive transport

Question 9

Are the “heads” of the phospholipid bilayer that makes up the cell membrane hydrophilic or hydrophobic?

Answer 9

hydrophilic

Question 10

Do carrier proteins require energy to move materials across the cell membrane?

Answer 10

No. The movement of materials across the cell membrane using carrier proteins move across is a form of facilitative diffusion. All forms of diffusion are passive transport and no energy is needed.

Question 11

Which requires energy, active transport or passive transport?

Answer 11

active transport

Question 12

In which type of diffusion is assistance by a transport protein required?

Answer 12

facilitative diffusion

Question 13

Are the “tails” of the phospholipid bilayer that makes up the cell membrane hydrophilic or hydrophobic?

Answer 13

hydrophobic

Question 14

Is facilitative diffusion a form of active transport or passive transport?

Answer 14

It is passive transport. All forms of diffusion are passive because no energy is needed.

Question 15

What term describes the characteristic of the cell membrane meaning that only certain materials are allowed to pass through?

Answer 15

semipermeable
(a.k.a. selectively permeable)

Question 16

What is the main job of the cell membrane?

Answer 16

The main job of the cell membrane is to control the movement of materials into and out of the cell.

Question 17

What term means “water loving?”

Answer 17

hydrophilic

Question 18

What type of protein assists with diffusion by carrying a molecule across the cell membrane?

Answer 18

carrier protein

Question 19

How many layers of phospholipids make up the cell membrane?

Answer 19

Two – it is called a phospholipid bilayer. (Bi means two.)

Question 20

What term means “water hating?”

Answer 20

hydrophobic

Question 21

What term is used to describe the diffusion of water?

Answer 21

osmosis

Question 22

What is another name for the lipid barrier that surrounds the cell that is also known as the plasma membrane?

Answer 22

cell membrane

Question 23

Is osmosis a form of active transport or passive transport?

Answer 23

It is passive transport. All forms of diffusion are passive because no energy is needed.

Question 24

Do channel proteins require energy to move materials across the cell membrane?

Answer 24

No. The movement of materials across the cell membrane using channel proteins move across is a form of facilitative diffusion. All forms of diffusion are passive transport and no energy is needed.

Question 25

What type of protein assists with diffusion by creating a passageway for a molecule to move across the cell membrane?

Answer 25

channel protein

Question 26

What term describes a solution or the environment outside the cell that has an equal concentration of dissolved materials compared to the concentration of dissolved materials inside the cell.

Answer 26

isotonic

Question 27

What term describes a solution or the environment outside the cell when it has a lower concentration of dissolved materials than inside the cell.

Answer 27

hypotonic