2.1

Question 1

the movement of particles from regions of higher density to regions of lower density

Answer 1

diffusion

Question 2

the diffusion of water through a semipermeable memrane

Answer 2

osmosis

Question 3

the movement of substances across a membrane without the use of energy by the cell.

Answer 3

passive transport

Question 4

the movement of substance across the cell membrane that requires the cell to use energy

Answer 4

active transport

Question 5

the process by which a cell membrane surrounds a particle and encloses the particle in a vesicle to bring the particle into the cell

Answer 5

endocytosis

Question 6

the process in which a cell releases a particle by enclosing the particle in a vesicle that then move to the cell surface and fuses with the cell membrane

Answer 6

exocytisis

Question 7

water is made up of partcles

Answer 7

molecules

Question 8

that only certain substances can pass through

Answer 8

semipermeable

Question 9

small particles, such as sugars, cross the cell membrane through passage ways

Answer 9

channels

Question 10

large particles move into and out of cell by processes called

Answer 10

endocytosis and exocytosis

Question 11

sacs formed from pieces of cell membrane

Answer 11

vesicle