Dissolved substances Flashcards
1
Q
how do dissolved substances move in and out of the cell
A
through the semi-permeable cell membrane by diffusion
2
Q
what is the definition of diffusion?
A
the gradual movement of particles form an area of high concentration to an area of low concentration thorough a semi-permeable cell membrane
3
Q
what two factors will affect the rate of diffusion
A
temperature and concentration
4
Q
what is the concentration gradient
A
a difference in concentration between two areas next two each other
5
Q
name two locations in the body where diffusion occurs and is important
A
lungs and small intestine
6
Q
which important gas passes through a cell membrane INTO a cell
A
oxygen
