Download HW#17: Diffusion Loops

Name__________________
Date___________________
Block__________________
HW#17
Reading: “Exchange with the
Environment”
DIFFUSION LOOPS
1) What is diffusion and when does it occur?
__________________________________________________________________
__________________________________________________________________
__________________________________________________________________
2) Please look at the following diagrams and indicate if diffusion will occur. The
large circle represents the cell membrane and the smaller circles are particles that
can move in and out of the cell.
Diffusion? (y/n)________
Diffusion? (y/n)________
*If diffusion will occur, will the particles move in or out of the cell? Please indicate
this with an arrow on the drawing.
3) What are two factors that can affect the speed of diffusion?
__________________________________________________________________
__________________________________________________________________
_________________________________________________________________
4) What are two ways that large molecules can be moved through a cell membrane?
What is the difference between these?
__________________________________________________________________
__________________________________________________________________
_________________________________________________________________
5) What would happen tot a cell if its channel proteins were damaged and unable to
transport particles? What would happen to the organism if many of its cells were
damaged in this way?
__________________________________________________________________
__________________________________________________________________
__________________________________________________________________
__________________________________________________________________
__________________________________________________________________
6) What happens to the cells of a plant if it is placed in water with a high
concentration of sugar?
__________________________________________________________________
__________________________________________________________________
__________________________________________________________________