transport across the cell membrane

Question 1

what is it called when only certain small molecules can exit/enter the cell?

Answer 1

selectively permeable

Question 2

what two things make up the cell membrane?

Answer 2

proteins and phospholipids

Question 3

what does passive mean?

Answer 3

requires no energy

Question 4

what does active mean?

Answer 4

does require energy

Question 5

explain active transport

Answer 5

movement of ions from an area of low concentration to an area of high concentration

Question 6

explain osmosis

Answer 6

movement of water molecules from an area of higher water concentration to a lower water concentration through a selectively permeable membrane

Question 7

explain diffusion

Answer 7

movement of small molecules from an area of high concentration to a low concentration through a selectively permeable membrane

Question 8

what happens when a plant cell goes into pure water?

Answer 8

cell becomes turgid

Question 9

what happens when a plant cell goes into a salt/sugar solution

Answer 9

cell becomes plasmolysed

Question 10

what happens when an animal cell goes into pure water

Answer 10

cell bursts

Question 11

what happens when an animal cell goes into a slat/sugar solution?

Answer 11

cell shrinks