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Amoeba Sisters Cell Transport Worksheet with Answers, Exercises of Biochemistry

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Amoeba Sìsters Video Recap: Celi Transport
important f r
maintaining
homeostasis, because it
controls what enters
and leaves a cell.
2. What is simple diffusion?
, -fy,r2e. o f po.s.s I V .e__, -bea. Y1 s pc,y-:±
, uses 110 erre rg�
t .
·l)AOve s f
com h; e PYI c.en +rei.,
-lo /ot.0 ca,ncedJ-oa±,�>:1
1. Sketch the
phospholipid bilayer of a celi membrane below and la bel the
polar heads and nonpolar tails. 3. Circle the statements below that would be TRUE about
simple diffusion. HINT: There is more than one!
(.W lt is a form of passive transport.
è]jJ Molecules trave! with the concentration gradient.
lt is how glucose travels across the celi membrane.
lt is how oxygen and carbon dioxide trave! 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 r� c.,ot'\
�0
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 t"-
D D
decide a certa in amount to piace on the left vs. the right side after e
viewing the arrow indicating the direction of movement. Label the high
concentration side and low concentration side.
Endocytpsis and Exocytosis
o
5.Are endocytosis and exocytosls for;._, of passive or active transprt? ·AJ-; ,;e__. +-'IQ\l'IS\?D{ t
6.Give a scenario where a celi may need to perform a form of eWiro���- , a� CV fos'/.s -C eJ)
su.veooYJols mo/w•Je.s Co""l"'3 /r1 [ be, �s -M.e,.,., ,·,r& ce/)
1ac:ì\l\1ou±) J/ -fii 1-
7. Give a scenario where a cell may need to perform a form of �5iocytosis.
f:e Si1
d 1/
- - �� -lfj-1 a,y
$;/: ,v...ove ofpos1fe c/ir�do"vz of eodM1:)1os/s
of\
pf2
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Amoeba Sìsters Video Recap: Celi Transport

important f r maintaining homeostasis, because it controls what enters and leaves a cell.

  1. What is simple diffusion?

, -fy,r2e. o f po.s.s I V .e__, -bea. Y1 s pc,y-:±

, uses^110 erre^ rg�

· l)AOve s f com h;� e PYI c.en+rei� t .,.

  1. Sketch the -lo /ot.0 ca,ncedJ-oa±,�>: phospholipid bilayer of a celi membrane below and label the polar heads and nonpolar tails. 3. Circle the statements below that would be TRUE about simple diffusion. HINT: There is more than one!

(.W lt is a form of passive transport. è]jJ Molecules trave! with the concentration gradient. � lt is how glucose travels across the celi membrane. � lt is how oxygen and carbon dioxide trave! across the membrane. E) This transport is typical for large molecules.

Moving with the Concentration Gradient }:.<

  1. "Moving with the flow" (i.e. going with the concentration gradient) is r� c.,ot'\� 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 (^) t"- D^ D

decide a certain amount to piace on the left vs. the right side after e

viewing the arrow indicating the direction of movement. Label the high concentration side and low concentration side.

Endocytpsis and Exocytosis

o

5. Are endocytosis and exocytosls^ for;., of passive or active transp�rt? ·AJ-;,;e_. +-'IQ\l'IS?D{t

6. Give a scenario where a celi may need to perform a form of eWiro����- , a� CV fos'/.s - C eJ)

su.veooYJols mo/w•Je.s Co""l"'3 /r1 [ be, �s -M.e,.,., ,·,r& ce/)

(^1) ac:ì\l\1 ou±

) J/ �-

fii

  1. Give a scenario where a cell may need to perform a form of �5iocytosis. f:e (^) Si1�

d 1/

- - �� -lfj-1 a,y

$;/: ,v...ove ofpos1fe c/ir�do"vz

of eodM1:)1os/s

_of_

Trcwclmg Molecule

F · th f Il win s t 11. 1 , d t rmln wh th r thc mal cules in the scenario are moving by (S) simple

diffu i n, (F) fa ilitated diffusion, or (A) active transport.

tra I ross the celi membrane at a substantial rate, the water molecules trave! through protein channels

il ater molecules are palar, they are also very small. One fact not mentioned in the video is that some water are able to squeeze directly through the phospholipid bilayer due to their small size.

1 l Charged ions are traveling through a celi membrane with the concentration gradient.

  1. A_cells lining the gut need to take in glucose, but at a certain time, the concentration of extracellular glucose is lower than the concentration already stored in the cells.
  2. _/t_At a certain time, glucose is in a�igh concentration outside of a cell and needs to travel through the membrane into the cell.

I Facilitated Diffusion via a Protein Channel

For the below image, label the 13. polar area and 14. non polar area on the diagram.

Draw in 15. protein channel and 16. molecules that would

I

represent a potential concentration gradient in facilitated diffusion via a protein channel on the diagram.

I (^) ti ls�

I

Conce.n-hJ-1�ncJ

o

o

C)

LDW^ �

Lo.-, c. er1 --rtt e

()

o

()

o

é)

Active Transport via a Protein Channel

For the below image, label the 17. polar area, and 18. non

polar area.

Draw in 19. protein channel and 20. molecules that would

represent a potential concentration gradient in active transport via a protein channel on the diagram.

Lo� (^) o

C:if\ce11+rJ,;ri o / ()

o

o o (^) é) o

�oVAt^ o

D o

)i

o o o

o

rr lot\U (^) e