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NYS Lab: Diffusion Through a NYS Lab: Diffusion Through a MembraneMembrane

Dialysis Cell Transport and Elodea

http://ccollege.hccs.cc.tx.us/instru/biology/AllStudyPages/Diffusion_Osmosis/Elodeagif.swf

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Windows(R) operating system and Mac OS X operating system software

Submitted by Joseph Saccone

Diffusion Through a Membrane

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SS

S

SS

S

G

GG G

GG

I

II III

I

II

IIII

II

II

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IodineGlucoseWaterStarch

In your notes describe what happened to each substance.

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GG

G SS

S

INSIDE OF DIALYSIS TUBE (CELL)

OUTSIDE OF DIALYSIS TUBE (CELL)

DIALYSIS TUBEDIALYSIS TUBE

DIALYSIS TUBEDIALYSIS TUBE

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Tests for _______ Tests for _______

and changes and changes

from blue to from blue to

_________._________.

Test for _______ Test for _______

and changes and changes

from amber to from amber to

_________._________.

Benedicts SolutionBenedicts Solution

IodineIodine

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Test for Test for GlucoseGlucose

and changes and changes

from blue to from blue to

Other colors.Other colors.

Test for Test for starchstarch

and changes and changes

from from amberamber to to

Black/purple.Black/purple.

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+ for glucose - for glucose

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What type of sugar is present in What type of sugar is present in this testthis test tube?tube?

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Absorption =Absorption =DiffusionDiffusion across the CELL across the CELL

MEMBRANE.MEMBRANE.

RECEPTOR PROTEINSRECEPTOR PROTEINS

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RED ONION IN FRESH WATER

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CELL WALL CYTOPLASM CELL MEMBRANE

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RED ONION IN SALT WATER

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LABEL THE FOLLOWING PARTS

CELL WALL CYTOPLASM CELL MEMBRANE

SALT WATER

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LABEL THE FOLLOWING PARTS

CELL WALL

CYTOPLASM

CELL MEMBRANE

SALT WATER

ANSWERS

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LABEL THE FOLLOWING PARTS

CELL WALLCYTOPLASMCELL MEMBRANESALT WATER

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Elodea under 400XElodea under 400X

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ElodeaElodea

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ElodeaElodea

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ElodeaElodea

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ElodeaElodea

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ElodeaElodea

Fresh solutionSalt solution

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Fresh solution

Saccone PowerpointDraw & label these blood vessels

1) Artery (arterioles)2) Vein (venule)

3) Capillary

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.

CapillariesCapillaries

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Capillary cross-section

• Very thin-walled

(one cell passes through at a time.)

This is where materials are exchanged between the blood and the body cells.

RBC

Capillary

NUCLEUS

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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