movement into and out of the cells Flashcards
1
Q
what is diffusion?
A
the random movement of particles from an area of high concentration to an area of low concentration
2
Q
what is net movement?
A
the general direction of the movement of particles
3
Q
what is a concentration gradient?
A
it is like a slope, from high concentration to low concentration, down which particles “move”
4
Q
how do living organisms use diffusion (examples)?
A
they get and remove most substances through diffusion
plants take in carbon dioxide to perform photosynthesis
oxygen diffues out of a leaf
5
Q
what is osmosis?
A
the diffusion of water molecules through a PARTIALLY PERMEABLE membrane
