KEY
Symbol
Substance
Movement
Facilitated
In/Out of Cell
0
Oxygen
Passive
No
in
Calcium ion
Passive
Yes
out
Sodium ion
Active
Yes
out
Glucose
Passive
Yes
in
Carbon
Dioxide
Passive
No
out
Instructions
Using the key and diagram, determine if each
substance moves in or out of the cell. Write
"in" or "out" in the space provided for the
given substance. Next, use an arrow to show
the direction of movement of two of each of
the substances through the membrane, and
where in the membrane they move through.
Hint- channel proteins have symbols indicat-
ing the substance they transport.