Exchange with the Environment 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 membrane.

Answer 2

Osmosis

Question 3

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

Answer 3

passive transport

Question 4

the movement of substances 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 moves to the cell surface and fuses with the cell membrane.

Answer 6

exocytosis

Question 7

water is made up of particles.

Answer 7

molecules

Question 8

only certain substances can pass through.

Answer 8

semipermeable

Question 9

small particles, such a sugars, cross the cell membrane through passageways.

Answer 9

channels

Question 10

large particle move into and out of the cell by this processes.

Answer 10

endocytosis and exocytosis

Question 11

are sacs formed from pieces of cell membrane.

Answer 11

vesicles