A cell membrane is ...................which means that it allows only
certain substances to enter or leave a cell
semipermeable
permeable
2
Passive transport is the movement of substances through a cell membrane by using energy
true
false
3
Diffusion is the movement of substances from an area of low conc. to an area of high concentration
true
false
4
diffusion continues till equilibrium
true
false
5
...............is the diffusion of water molecules only through a membrane
facilitated diffusion
Osmosis
6
Transport proteins that carry large molecules, such as sugar molecules, through a cell membrane ..........
Carrier proteins
channel proteins
7
Transport proteins that form pores through a cell membrane
channel proteins
Carrier Proteins
8
When molecules pass through a cell membrane using special proteins
facilitated diffusion
Osmosis
9
facilitated diffusion needs energy
true
false
10
membranes are boundaries between cells and organelles
true
false
