Download Transport packet

NAME______________________ DATE_________ PERIOD_________
Cell Membrane/Transport Powerpoint Packet
Composition of the Cell Membrane & Functions
The cell membrane is also called the _______________
membrane and is made of a phospholipid _____________. The
phospholipids have a hydrophilic (water attracting) __________ and
two hydrophobic (water repelling) ____________. The head of a
phospholipid is made of an alcohol and __________ group, while the
tails are chains of ____________. Phospholipids can move
_______________ and allow water and other _________ molecules
to pass through into or out of the cell. This is known as simple
____________ because it does not require __________ and the
water or molecules are moving __________ the concentration
gradient. Sketch and label a phospholipid coloring the heads red and
the tails blue.
PHOSPHOLIPID
Another type of lipid in the cell membrane is ______________
that makes the membrane more fluid. Embedded in the phospholipid
bilayer are __________ that also aid in diffusion and in cell
recognition. Proteins called _____________ proteins go all the way
through the bilayer, while ____________ proteins are only on one
side. Integral proteins are also called __________ proteins. Large
molecules like carbohydrates or _________ molecules use proteins to
help move across cell membranes. Some of the membrane proteins
called ____________ have carbohydrate __________ attached to
help cells in recognize each other and certain molecules. So, small,
________ molecules pass easily through cell membrane, while larger,
___________ molecules must go through transport proteins.
List 4 functions of the cell or plasma membrane:
a.
_________________________________________
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b.
_________________________________________
c.
_________________________________________
d.
_________________________________________
Correctly color code and identify the name for each part of the cell
membrane.
Letter
Name/Color
Letter
Name/Color
_____ Phospholipid bilayer (no _____
Peripheral protein
color)
(red)
_____ Integral protein (pink) _____
Cholesterol (blue)
_____ Fatty acid tails
_____
Glycoprotein (green)
(orange)
(w/carbohydrate)
_____ Phosphate heads
_____
Glycolipids (purple)
(yellow)
(w/carbohydrate)
Match the cell membrane structure or its function with the correct
letter from the cell membrane diagram.
Letter
_____
_____
_____
Structure/Function
Letter
Structure/Function
Attracts water
_____
Repels water
Helps maintain flexibility of
membrane
Involved in cell-to-cell
recognition
_____
Make up the bilayer
_____
Help transport certain materials
across the cell membrane
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Cellular Transport Goal: to maintain ______________ in the
cell
1.
Passive Transport:
Three types: __________, ____________,
_________
a. Diffusion: Requires ___ energy; molecules move
from ______ concentration to ___ concentration; goes ______ the
concentration gradient
List two examples of diffusion:
b. Facilitated Diffusion: Does ____ require energy;
Uses _________ proteins to move substances from _____
concentration to ____ concentration
List both types of proteins and describe each:
List two examples of facilitated diffusion:
c. Osmosis: Movement of ________ through a
_________ from a _____ concentration of water to a ____
concentration of water. Uses ____ energy.
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Osmosis and Tonicity
Define osmosis. _____________________________________
In which direction does water move across membranes, up or down the
concentration gradient? ________________
Define these 3 terms:
a. isotonic_____________________________________
b. hypertonic _____________________________________
c. hypotonic
_____________________________________
Use arrows to show the direction of water movement into or out
of each cell. Color and label the cell in an isotonic environment light
blue, the hypotonic environment yellow, and the hypertonic environment
light green.
Match the description or picture with the osmotic condition:
A. Isotonic
_____ solution with a lower solute concentration
_____ solution in which the solute concentration is the same
B. Hypertonic
_____ condition plant cells require
_____ condition that animal cells require
C. Hypotonic
_____ red blood cell bursts (cytolysis)
_____ plant cell loses turgor pressure (Plasmolysis)
_____ solution with a higher solute concentration
_____ plant cell with good turgor pressure
_____ solution with a high water concentration
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Label the tonicity for each solution (isotonic, hypotonic, or
hypertonic):
____________
____________
2.
____________
____________
____________
_ ___________
Active Transport:
What type of transport is represented by the following picture?
_______________________
What energy is being used? ______________
In which direction (concentration gradient), is the movement
occurring? _________________
Color the internal environment of the cell yellow. Color and Label the
transport proteins red and the substance being moved blue.
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One type of active transport is called the ________________ pump
which helps muscle cells contract. This pump uses ___________ to
move ions __________ the concentration gradient. The protein that
is used to pump the ions through is called a ____________ protein
and it changes its __________ to move the ions across the cell
membrane. Label and color the carrier proteins red and the ions
green.
Another type of active transport involves moving substances out of the
cell. It is called _________________. Molecules are moved out by
__________ which fuse with the ___________.
List two examples of exocytosis:
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Substances can also be transported into the cell by active transport
through a process called ____________. The most common form of
endocytosis called ______________ involves taking in ___________
substances using a _________. This can be translated as “cell _________”
_________________ endocytosis involves ___________ with
___________ on their surfaces which recognize and take in hormones,
cholesterol, etc. This process also forms ___________ like
pinocytosis.
Also known as “cell – eating”, _____________ engulfs large particles
like food and bacteria into ___________
List an example of this process:
Is the diagram below exocytosis or endocytosis? Explain.
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