Movement of Substances In & Out of Cells

Question 1

Active

Answer 1

A process which requires energy to occur

Question 2

Active transport

Answer 2

Active movement of molecules from an area of low concentration to an area of high concentration against a concentration gradient

Question 3

Concentration gradient

Answer 3

a difference in concentration of a substances between two areas

Question 4

Diffusion

Answer 4

passive movement of molecules from an area of high concentration to an area of low conentration - down a concentration gradient

Question 5

flaccid cell

Answer 5

a cell with a reduced amount of water

Question 6

osmosis

Answer 6

passive movement of water from an area of high water potential to an area of low water potential, down a concentration gradient through a selectively permeable membrane

Question 7

partially permeable membrane

Answer 7

A membrane which allows some molecules to pass through but not others

Question 8

passive

Answer 8

a process that does not require energy to occur

Question 9

plasmolysed

Answer 9

condition a plant cells that has lost lots of water so its cell membrane has pulled away from the cell wall

Question 10

turgid

Answer 10

a turgid cell is one that is full of water

Question 11

water potential

Answer 11

a measure of the ability of water molecules to move