Movement of substances Flashcards
1
Q
What is diffusion?
A
the net random movement of particles from an area of high concentration to an area of low concentration
2
Q
What is active transport?
A
the net random movement of particles from an area of low concentration to an area of high concentration, requiring energy, against a concentration gradient
3
Q
What is a concentration gradient?
A
the difference in concentration between two areas
4
Q
What is surface area to volume ratio?
A
the size of the object compared with the the area that is in contact with the environment