cell biology 6 Flashcards
(4 cards)
1
Q
what is passive transport
A
when molecules travel down the concentration gradient across a membrane, without using any energy
2
Q
give two examples of passive transport
A
osmosis and diffusion
3
Q
name 3 molecules/substance which move by diffusion
A
oxygen, carbon dioxide, glucose
4
Q
what js active transport
A
when molecules are transported against the concentration gradient, requiring the use of chemical energy
