AMOEBA SISTERS: VIDEO RECAP CELL TRANSPORT
Amoeba Sisters Video Recap: Cell Transport
The cell membrane is 2. What is simple diffusion?
important for
maintaining Molecules moving through the cell membrane.
____________________________________________________
homeostasis, because it
controls what enters Type of passive transport
____________________________________________________
and leaves a cell.
Uses no energy
____________________________________________________
1. Sketch the Moves from high conc. to low conc.
____________________________________________________
phospholipid bilayer of a cell membrane below and label the
polar heads and nonpolar tails. 3. Circle the statements below that would be TRUE about
Polar heads simple diffusion. HINT: There is more than one!
A) It is a form of passive transport.
B) Molecules travel with the concentration gradient.
Nonpolar tails
C) It is how glucose travels across the cell membrane.
D) It is how oxygen and carbon dioxide travel across the
membrane.
E) This transport is typical for large molecules.
Moving with the Concentration Gradient
4. “Moving with the flow” (i.e. going with the concentration gradient) is
the direction of flow in passive transport. Show this in the diagram on
right by drawing in 10 total circles (to represent molecules). You must
decide a certain amount to place on the left vs. the right side after
viewing the arrow indicating the direction of movement. Label the high
concentration side and low concentration side.
Endocytosis and Exocytosis
5. Are endocytosis and exocytosis forms of passive or active transport? ______________________________________________
6. Give a scenario where a cell may need to perform a form of endocytosis. ___________________________________________
_________________________________________________________________________________________________________
_________________________________________________________________________________________________________
7. Give a scenario where a cell may need to perform a form of exocytosis. ____________________________________________
_________________________________________________________________________________________________________
_________________________________________________________________________________________________________
Amoeba Sisters Video Recap: Cell Transport
The cell membrane is 2. What is simple diffusion?
important for
maintaining Molecules moving through the cell membrane.
____________________________________________________
homeostasis, because it
controls what enters Type of passive transport
____________________________________________________
and leaves a cell.
Uses no energy
____________________________________________________
1. Sketch the Moves from high conc. to low conc.
____________________________________________________
phospholipid bilayer of a cell membrane below and label the
polar heads and nonpolar tails. 3. Circle the statements below that would be TRUE about
Polar heads simple diffusion. HINT: There is more than one!
A) It is a form of passive transport.
B) Molecules travel with the concentration gradient.
Nonpolar tails
C) It is how glucose travels across the cell membrane.
D) It is how oxygen and carbon dioxide travel across the
membrane.
E) This transport is typical for large molecules.
Moving with the Concentration Gradient
4. “Moving with the flow” (i.e. going with the concentration gradient) is
the direction of flow in passive transport. Show this in the diagram on
right by drawing in 10 total circles (to represent molecules). You must
decide a certain amount to place on the left vs. the right side after
viewing the arrow indicating the direction of movement. Label the high
concentration side and low concentration side.
Endocytosis and Exocytosis
5. Are endocytosis and exocytosis forms of passive or active transport? ______________________________________________
6. Give a scenario where a cell may need to perform a form of endocytosis. ___________________________________________
_________________________________________________________________________________________________________
_________________________________________________________________________________________________________
7. Give a scenario where a cell may need to perform a form of exocytosis. ____________________________________________
_________________________________________________________________________________________________________
_________________________________________________________________________________________________________
