Download Cell Membrane and Transport Study Guide

Cell Membrane and Transport Study Guide
Plasma Membrane Structure and Properties:
In the following image below:
1. Draw a box around one phospholipid.
2. Label the brackets as being either hydrophobic region or hydrophilic
3. Label all the leader lines with the following terms:
 carbohydrate side chain
 marker protein
 channel protein
4. The plasma or cell membrane is considered __________________ __________________ because it
regulates what enters and leaves the cell.
5. The monomers that make up a phospholipid are ____________ group attached to a ______________
molecule and two _________ __________ tails.
6. The phosphate heads are _________________ (water-loving).
7. The fatty acid tails are _______________ (water-hating)
8. Because of this property, phospholipids form ____ layers in water, with the hydrophobic tails facing
____ and the hydrophilic heads facing the ______________.
9. Due to the membrane’s hydrophobic and fatty properties, the cell membrane allows the following
items to pass through:
a.
b.
c.
10. Charged molecules or ________ cannot penetrate the hydrophobic core because it is
________________ (water-loving). Things that are too __________ in size also cannot pass through the
core, unless it is assisted by a _____________ protein.
Cell Transport Methods:
11. Complete the Venn Diagram comparing and contrasting Active vs. Passive Transport.
Passive
12. List three types of passive transport:
a.
b.
c.
13. Draw arrows in the diagram to the right,
indicating the direction in which the
particles move across the membrane
via diffusion.
14. What is osmosis?
15. In the image to the right, draw an arrow indicating
the movement of water molecules through
the membrane via osmosis.
16. The glucose in the image to the right is too big to
pass through the membrane. However, if it were to
be “assisted” across the membrane by a
channel protein, this process would be called
______________ _______________.
Active
17. List three types of active transport:
a.
b.
c.
18.Which image(s) to the right best represents active transport?
19.Which image(s) best represents passive transport?
20. The energy that the cell uses for active transport is
called ___ ___ ___
21. Why might material need energy to move through the cell membrane?
a.
b.
22. Draw arrows in the diagram to the right, indicating the
direction in which the particles move across the membrane
via active transport.
23. Name two ways in which a particle that is too large to fit
through the cell membrane can still enter the cell?
a. _______________________________________________
b. _______________________________________________
24. Which diagram to the right represents exocytosis?
25. Which diagram to the right represents endocytosis?
A
26. Explain what is happening in the diagram through
the process of endocytosis and distinguish between
phagocytosis and pinocytosis.
B
27. Explain what is happening in the diagram through
the process of exocytosis.
28. A cell is soaking in a 20% salt solution. What percent of this solution is water? _____ If the cell itself
has 10% solutes, what percent of the cell is water? ______. This makes the cell (hypo-, iso-, hyper-) tonic
compared to the salt solution, which is (hypo-, iso-, hyper-) tonic. Water will therefore move ________
of the cell, and the cell will _____________ in size.