Names: _________________________________________________ Date: ____________________ Bl: ______
Cell Structure & Transport WebQuest
Procedure: Access the GoogleDoc “Cell & Transport Activities.” Follow the links and complete the following for each of
the sites.
1. Virtual Lab - Cell Response to different solutions
a. Complete the table
Red Blood Cell: Red Blood Cell: Elodea Cell:
Water
Appearance
Water
movement
movement
Elodea Cell:
Appearance
Paramecium Cell:
Water movement
Paramecium Cell:
Appearance
Hyptotonic
Solution
Isotonic
Solution
Hypertonic
Solution
b. Did water move into or out of the cells in a hypotonic environment? Explain this movement.
c. Did water move into or out of the cells in a hypertonic environment? Explain this movement.
2. Diffusion Animation – watch the animation & answer the questions below
Simple diffusion is defined as the movement of
a. Molecules from areas of higher concentration to
areas of lower concentration
b. Molecules from areas of lower concentration to
areas of higher concentration
c. Water molecules across a membrane
d. Gas molecules across a membrane
e. Gas or water molecules across a membrane
When sugar is mixed with water, equilibrium is reached
when
a. Molecules of sugar stop moving
b. Water and sugar molecules are moving at the
same speed
c. The dissolved sugar molecules are evenly
distributed throughout the solution
d. There are the same number of water molecules
as dissolved sugar molecules
e. Two tablespoons of coffee are added
Diffusion is one of the processes whereby materials are
exchanged between a cell & its environment.
a. True
b. False
The molecules in a solid lump of sugar do not move.
a. True
b. False
The rate of diffusion is affected by which of the following?
a. Temperature
c. Steepness of the concentration gradient
b. Size of molecules
d. A & B
e. A, B, & C
3. Facilitated Diffusion Animation – watch the animation, read the text below the animation & answer the
following questions
Facilitated Diffusion requires:
a. Enzymes
b. Carrier proteins
c. Lipid carriers
d. Carbohydrate carriers
e. Lipid or carbohydrate carriers
Facilitated diffusion occurs:
a. Into the cell only
b. Out of the cell only
c. In either direction depending on the temp
d. In either direction depending on the
concentration gradient
e. In either direction depending on the size of the
molecule
Unlike simple diffusion, facilitated diffusion requires
energy cost by the cell:
a. True
b. False
Facilitated diffusion requires a specific transporter for a
specific molecule.
a. True
b. False
Facilitated diffusion is used to transport
a. Sugars & amino acids
c.
b. H2o &O2
d.
CO2 & O2
CO2 & H2O
e.
Sugars & H2O
4. Osmosis Animation – watch the animation, read the text beneath the animation & answer the following
questions
A red blood cell placed in a hypertonic medium will
a. Expand
b. Burst
c. Shrink
d. Have no change in shape
e. Become a white blood cell
Which of the following will pass through a cell
membrane most easily?
a. Small polar molecules
b. Small nonpolar molecules
c. Large polar molecules
d. Large nonpolar molecules
e. Large neutral molecules
Osmosis is best defined as the movement of
a. Molecules from an area of high concentration to
an area of low concentration
b. Molecules from an area of low concentration to
an area of high concentration
c. Water molecules across a membrane from an
area of low water to an area of higher
concentration
d. Water molecules across a membrane from an
area of high water concentration to an area of
lower concentration
e. Water molecules inside a container
A 5% urea solution is hypotonic to a 10% solution.
a. True
b. False
If a cell is placed in an isotonic medium, there will be
no net movement of water.
a. True
b. False
5. Phagocytosis Animation – watch the animation, read the text beneath the animation, and answer the questions
below.
Phagocytes are attracted by all of the following except:
a. Phospholipids released by injured cells
b. Components of the complement system
c. Chemical products of microorganisms
d. Lysosomes
In phagocytosis, the digested contents are eliminated by
c. Endocytosis
d. Exocytosis
e. Opsonization
f. C3b
A lysosome
a. Is found only inside the bacterium being digested
b. Is an organelle that makes a bacterium motile
c. Contains lysozyme and proteases which digest
bacteria
d. Contains enzymes specific to the receptors on the
bacterium being eliminated
6. Cells Alive
A phagosome containing the engulfed bacteria combines
with a lysosome containing enzymes to produce a
phagolysosome.
a. True
b. False