Cell Respiration Lab

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Osmosis and Cell Respiration Lab Fact Sheet and Tips

Tips:

You must let the tubing sit in water for at least 10 minutes first before opening it. DO NOT LET THE MEMBRANE DRY OUT ONCE IT IS WET

Cut the dialysis tubing to about 15 cm. Recommended solution in dialysis tube: 5 mL

Control all the variables, determine what you need to perform the experiment - what kind of data do you need to be able to answer the question?

__________________________________________________________

Relevant facts that you may choose to use:

Atoms tend to diffuse from an area of high concentration to an area of low concentration
Matter has mass
Dialysis tubing is manufactured from seamless, regenerated cellulose membrane, with pores that allow molecules in if
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DO NOT LET THE MEMBRANE DRY OUT ONCE IT IS WET

Cut the dialysis tubing to about 15 cm. Recommended solution in dialysis tube: 5 m.

Control all the variables, determine what you need to perform the experiment - what kind of data do you need to be able to answer the question?

__________________________________________________________

Relevant facts that you may choose to use:

Atoms tend to diffuse from an area of high concentration to an area of low concentration
Matter has mass
Dialysis tubing is manufactured from seamless, regenerated cellulose membrane, with pores that allow molecules in if small enough

4) Matter is composed of atoms that are constantly in motion
5) The cell membrane is often called a phospholipid bilayer because it is composed of two layers of phospholipids
6) Cell membranes are semi-permeable, meaning it will allow certain things to cross through, but not others, based on the molecules’ size and polarity
7) Starch is a polysaccharide (polymer of a carbohydrate) and are quite large
8) Molecules that are too large won’t be able to cross the membrane without proteins channels that facilitate their movement
9) Dialysis tubing behaves just like the membranes of Red Blood