NYS Lab: Diffusion Through a
Membrane
Dialysis Cell Transport and Elodea
http://ccollege.hccs.cc.tx.us/instru/biology/AllStudyPages/Diffusion_Osmosis/Elodeagif.sw
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Diffusion Through a Membrane
Windows(R) operating system and Mac OS X operating system software
Submitted by Joseph Saccone
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G
G
G
I
G
G
G
I
I I
I
I
I
I
I
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Iodine
Glucose
Water
Starch
In your notes describe what happened
to each substance.
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INSIDE OF DIALYSIS TUBE (CELL)
G
G
G
S
S
S
DIALYSIS TUBE
DIALYSIS TUBE
DIALYSIS TUBE
DIALYSIS TUBE
OUTSIDE OF DIALYSIS TUBE (CELL)
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Benedicts Solution
Iodine
Tests for _______
and changes
from blue to
_________.
Test for _______
and changes
from amber to
_________.
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Test for Glucose
and changes
Test for starch
from blue to
and changes
Other colors.
from amber to
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Black/purple.
+ for glucose
- for glucose
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What type of sugar is present in this test
tube?
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Absorption =
Diffusion across the CELL
MEMBRANE.
RECEPTOR PROTEINS
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RED ONION IN FRESH WATER
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CELL WALL
CYTOPLASM
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CELL MEMBRANE
RED ONION IN SALT WATER
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LABEL THE FOLLOWING PARTS
SALT WATER
CELL WALL
CYTOPLASM
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CELL MEMBRANE
LABEL THE FOLLOWING PARTS
CELL WALL
ANSWERS
CELL MEMBRANE
CYTOPLASM
SALT WATER
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LABEL THE FOLLOWING PARTS
SALT WATER
CYTOPLASM
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CELL MEMBRANE
CELL WALL
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Elodea under 400X
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Elodea
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Elodea
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Elodea
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Elodea
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Elodea
Fresh solution
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Salt solution
Fresh solution
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Capillaries
Very
thin-walled (one cell thick).
Site for the exchange of materials between the blood &
body tissue (cells). (where Hemo does his work)
Arterioles
and venules are connected by capillaries.
1) Artery (arterioles)
2) Vein (venule)
3) Capillary
Draw & label these blood vessels
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Capillary cross-section
NUCLEUS
• Very thin-walled
(one cell passes
through at a time.)
This is where materials
are exchanged
between the blood and
the body cells.
Capillary
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RBC
contractile vacuole
• Regulates osmotic environment in a living
Paramecium
• exposure to a strongly hypotonic solution
resulted in the cell's ability to quickly adjust
to
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Salt and cells
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