2.1 Exchange with the Environment

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 membrane is called

Answer 2

osmosis

Question 3

water is made up of particles called

Answer 3

molecules

Question 4

only certain substances can pass through (meaning)

Answer 4

semipermeable

Question 5

small particles, such as sugars, cross the cell membrane through passageways called

Answer 5

channels

Question 6

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

Answer 6

passive transport

Question 7

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

Answer 7

active transport

Question 8

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 8

endocytosis

Question 9

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

Answer 9

exocytosis

Question 10

sacs formed from pieces of the cell membrane

Answer 10

vesicle