AMOEBA SISTERS: VIDEO RECAP CELL TRANSPORT
Amoeba Sisters Video Recap: Cell Transport
The cell membrane is
important for
maintaining
homeostasis, because it
controls what enters
and leaves a cell.
1. Sketch the
phospholipid bilayer of a cell membrane below and label
the polar heads and nonpolar tails.
2. What is simple diffusion?
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3. Circle the statements below that would be TRUE
about simple diffusion. HINT: There is more than one!
A) It is a form of passive transport.
B) Molecules travel with the concentration gradient.
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. ___________________________________________
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7. Give a scenario where a cell may need to perform a form of exocytosis. ____________________________________________
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